Justin Bieber poses for a picture with boxer Floyd Mayweather, Jr. at the Cotto vs. Mayweather, Jr. match held at the MGM Grand Garden Arena on Saturday (May 5) in Las Vegas.

The 18-year-old entertainer watched as Floyd defeated Miguel Cotto for the World Boxing Association’s super welterweight title championship! Justin stuck around after the fight to celebrate with Floyd, Lil’ Wayne and 50 Cent. Congratulations, Floyd!

“@FloydMayweather Hard Work & Dedication . congrats champ. glad i could be a part of it” Justin tweeted at Floyd after the big boxing fight.

In case you missed it, check out Justin‘s latest music video for his song “Boyfriend”.

10+ pictures inside of Justin Bieber celebrating Floyd Mayweather, Jr.‘s victory…

Ginnifer Goodwin and Kellan Lutz arrive in style to the 138th Kentucky Derby held at Churchill Downs on Saturday (May 5) in Louisville, Kentucky.

Kellan, 27, who was joined by his girlfriend Sharni Vinson, and Ginnifer, 33, hit the red carpet with Miranda Lambert.

PHOTOS: Check out the latest pics of Kellan Lutz

“Get yer horsey hat on. Happy @KentuckyDerby!” Ginnifer tweeted. “I won $12.50!” she added.

Miranda seemed to hit the jackpot! “I’m lucky today! I won!” she tweeted, along with a picture of her holding several hundred dollar bills.

FYI: Moet & Chandon helped sponsor the event.

Check out Sacha Baron Cohen as The Dictator (Admiral General Aladeen) and Kristen Wiig as the Tanning Mom in this hilarious Weekend Update sketch on Saturday Night Live on Saturday (May 5).

Host Seth Meyers spoke with Sacha in character as The Dictator, who also brought out special guest, director Martin Scorsese, as one of his fake torture victims. Martin directed Sacha in Hugo!

Kristen Wiig delivered laughs as the Tanning Mom aka Patricia Krentcil. “I would never bring a 5-year-old into a tanning bed…you may not know this Seth, some people over tan!” Kristen said.

Check out Sacha as The Dictator below, and click inside to see Kristen impersonate the infamous Tanning Mom…

Kate Bosworth strikes a pose alongside fellow fashionista Rosie Huntington-Whiteley at super hairstylist Harry Josh‘s first annual Hairball Party held at the top of the beautiful Standard Hotel on Saturday night (May 5) in New York City.

PHOTOS: Check out the latest pics of Kate Bosworth

Harry had a great turn-out for the event, which also included Kate‘s boyfriend, director Michael Polish, JustJared.com founder Jared Eng, and models Anne V and Karolina Kurkova.

Follow Harry on Twitter @HarryJoshHair and Facebook.com/HarryJoshHair!

15+ pictures inside of Kate Bosworth and more at Harry Josh’s Hairball Party…

Gisele Bundchen comes out to support her longtime friend, celeb hairstylist Harry Josh, at his first annual Hairball Party held at the top of the beautiful Standard Hotel on Saturday night (May 5) in New York City.

JustJared.com exclusively covered the party and spotted the 31-year-old Brazilian beauty dancing to “Give Me Everything” by Pitbull featuring Ne-Yo, Afrojack, and Nayer.

PHOTOS: Check out the latest pics of Gisele Bundchen

Gisele tore up the dance floor with her husband, Tom Brady, quarterback for the New England Patriots. She even wore his newsboy cap while getting her groove on!

Follow Harry on Twitter @HarryJoshHair and Facebook.com/HarryJoshHair!

Eli Manning is colorful in full drag as Miss Chicken-Fried Steak in a sketch called “Miss Drag World” from last night’s Saturday Night Live episode!

The 31-year-old football star and this week’s host played a man dressed as a woman who reacts poorly to losing a beauty pageant.

“Third place! Do the judges not have eyeballs?!” Eli said in the sketch.

Eli is not the only sports star to go drag on SNL – both Charles Barkley and Derek Jeter have donned ladies clothing on the hit sketch comedy show!

Mark Wahlberg shows off his bulging biceps in a tank top splattered with blood on the set of his film Pain and Gain on Friday (May 4) in Miami, Fla.

The 40-year-old actor beefed up for his role in the upcoming Michael Bay-directed film, but he did not use steroids to achieve his look.

“Even though the film is about steroid abusing gym rats, he took it as a personal challenge to get to the size he is at now and has been training non-stop,” a source told Us Weekly.

Also pictured inside: Mark listening to music while hanging out shirtless on his hotel balcony.

Shiri Appleby and Shameless stud Zach McGowan attend P.S. Arts’ Evening of Modernism held at Barker Hangar on Friday (May 4) in Santa Monica, Calif.

They were joined at the event by Zach‘s wife Emily McGowan, Shawn Pyfrom, Lisa Kudrow, and Julie Bowen.

P.S. Arts is a non-profit that recruits, hires, underwrites and trains professional artists to develop curriculum and teach classes during the regular school day.

Over the weekend, Zach went to Six Flags to celebrate his birthday!

“Roller coasters have come a long way since last I rode…. And they are awesome! Just got off tatsu #ibelieveicanfly,” he tweeted.

15+ pictures inside of Shiri Appleby and Zach McGowan at the P.S. Arts celebration…

Cam Gigandet carries his adorable daughter Everleigh, 3, around while enjoying the sunny weather at Disneyland on Friday (May 4) in Anaheim, Calif.

The 29-year-old actor and girlfriend Dominique Geisendorff took pictures of Everleigh while they explored the theme park.

PHOTOS: Check out the latest pics of Cam Gigandet

Cam is currently filming his new flick, Code Name: Geronimo, which is set to be released next year.

The movie follows a group of Navy SEALs who come to learn the identity of their next target: Osama bin Laden.

Rosie Huntington-Whiteley walks through the airport after landing at JFK on Saturday (May 5) in New York City.

The 25-year-old English model, who was joined by her pal Nikki Pennie, is expected to attend the 2012 MET Ball this week!

“Why is it @CherCoulter everywhere we go with @nikkipennie there’s always someone she knows LMAO at the airport she’s said hi to like 10 ppl,” Rosie tweeted.

Also pictured inside: Rosie‘s boyfriend Jason Statham on the set of his film Hummingbird earlier in the week in London.

10+ pictures inside of Rosie Huntington-Whiteley and Jason Statham out and about…

Naomi Watts and Liev Schreiber take their son Alexander to a park to play on a gorgeous Friday (May 4) in New York City.

The 43-year-old English actress held hands with her son as they strolled through the park.

Naomi is rumored to be part of an upcoming movie with Ben Stiller called While We’re Young. It follows the story of an uptight documentary filmmaker and his wife who find their lives loosened up a bit after befriending a free-spirited younger couple.

Also pictured: Naomi out and about in her neighborhood on Thursday (May 3).

10+ pictures inside of Naomi Watts and hubby Liev Schreiber enjoying a day at the park with their son Alexander…

Sofia Vergara smiles and waves for the camera as she and a friend do a little shopping on Friday (May 4) in New York City.

The 39-year-old Modern Family actress stopped in at the Scoop boutique to take a look around.

PHOTOS: Check out the latest pics of Sofia Vergara

Sofia is up for a part in the upcoming action movie Machete Kills. While it hasn’t been confirmed yet, rumors have been flying around about Sofia joining Jessica Alba and Mel Gibson in the flick.

10+ pictures inside of Sofia Vergara shopping at Scoop in Soho…

Rihanna poses in one of the bumper images for her appearance on Saturday Night Live on Saturday (May 5).

The 24-year-old singer performed twice during the show. Her first performance started out with “Birthday Cake” before she segued into “Talk That Talk”. Later in the show, RiRi performed her new hit, “Where Have You Been”.

Unfortunately, Rihanna did not act in a sketch during the episode as she had done the first two times she appeared on the show.

Watch “Birthday Cake/Talk That Talk” below and click inside to watch “Where Have You Been”…

Zoe Saldana attends the third night of Coldplay‘s concert held at the Hollywood Bowl on Friday (May 4) in Hollywood.

The 33-year-old actress and a gal pal were escorted to their seats once they arrived.

PHOTOS: Check out the latest pics of Zoe Saldana

This month, Zoe‘s on the first-ever cover of Cosmopolitan for Latinas!

She’s currently filming the untitled Star Trek sequel and will next appear in the thriller, The Words, alongside Olivia Wilde and Bradley Cooper.

Also picture inside: Jared Leto attending the concert.

10+ pictures inside of Zoe Saldana and Jared Leto at the Coldplay concert…

Willow Smith walks in between her parents Will and Jada Pinkett Smith as they head into LAX airport to catch a flight out of Los Angeles on Saturday (May 5).

In case you missed it, check out the 11-year-old singer’s recently released video for her song “Do It Like Me (Rockstar)“. Even though the video was just released, it was the first one she ever shot and also features her brother Jaden.

Will‘s new flick Men in Black III hits theaters this summer, but make sure to catch up on the first two films, both of which were just released on Bluray!

15+ pictures inside of Willow Smith at the airport with her parents…

Drew Barrymore and pal Cameron Diaz hold hands as they leave the Coldplay concert at the Hollywood Bowl on Friday (May 4) in Hollywood.

The former Charlie’s Angels co-stars were just two of the many celebs to show up to the star-studded concert.

PHOTOS: Check out the latest pics of Drew Barrymore

Earlier in the day, Drew met up with her hair stylist Tracey Cunningham at the Byron and Tracey Salon in Beverly Hills.

10+ pictures inside of Drew Barrymore at the salon and the Coldplay concert…

Halle Berry spends her Cinco de Mayo at the beach with her fiance Olivier Martinez and daughter Nahla on Saturday (May 5) in Malibu, Calif.

The 45-year-old actress’ legal battles with her ex Gabriel Aubry have continued yet again.

PHOTOS: Check out the latest pics of Halle Berry

Gabriel is asking the judge in the custody battle for Halle to pay him $20,000 a month in child support and $500,000 in attorney fees, according to TMZ.

10+ pictures inside of Halle Berry at the beach with her fiance and daughter…

Christopher Meloni shows off his fangs in this first look of him as a vampire in the upcoming fifth season of True Blood.

The 51-year-old former Law & Order: SVU actor is starring as Roman, a new character on the hit HBO series.

In case you missed them, check out some brand new promo pics of the cast – including Stephen Moyer, Anna Paquin, and Alexander Skarsgard – that were just released!

True Blood returns to television on June 10. We can’t wait!

Gwen Stefani takes her son Kingston to the movies to check out the new Disney movie Chimpanzee on Friday (May 4) in Sherman Oaks, Calif.

The 42-year-old rocker and fashionista hit up the Coldplay concert at the Hollywood Bowl later that night. She was joined by No Doubt bandmate Tony Kanal.

Gwen tweeted about the concert, saying, “Coldplay gx cd = hot” and posted a picture of herself, Tony, Sandra Bullock, and Cameron Diaz, who also went to the concert!

15+ pictures inside of Gwen Stefani taking Kingston to the movies and seeing the Coldplay concert…

Julie Benz and her fiance Rich Orosco have tied the knot, her rep confirms to JustJared.com.

The 40-year-old former Dexter and Desperate Housewives actress has been with Rich, a marketing executive, for over four years.

Julie and Rich got engaged in June 2011.

"The proposal was simple and beautiful – and then I was shocked by the pop-up surprise Mexican fiesta engagement party," Julie said at the time. "What girl doesn't want to be serenaded by a Mariachi band surrounded by close friends and family?"

Us Weekly was the first to report the news. Congratulations to the happy couple!

Evan Rachel Wood and Scott Speedman‘s stunt double get into character on the set of their movie Barefoot on Friday (May 4) in New Orleans, La.

The 24-year-old actress hopped out of a Dodge motor home, while the stunt man climbed out more slowly.

PHOTOS: Check out the latest pics of Evan Rachel Wood

Barefoot is a romantic dramedy that revolves around Daisy (Wood), a patient in a psychiatric center, and the romantic relationship she develops with one of her doctors. The movie will hit theaters next year!

Emma Roberts looks chic in a leopard print scarf while out and about on Friday (May 4) in New York City.

The 21-year-old actress enjoyed the afternoon by shopping at the Rebecca Taylor boutique.

PHOTOS: Check out the latest pics of Emma Roberts

The night before, Emma attended the screening of her good friend Chloe Moretz‘s new film Hick.

The two tweeted their excitement about reuniting before meeting up on the red carpet.

Other celebs who attended the New York premiere of Hick included Aaron Carter and Chloe's co-star Rory Culkin.

Anna Paquin shows off her tiny baby bump at the Huggies Hawaiian and Baby2Baby Luau event on Saturday (May 5) in Beverly Hills, Calif.

Ellen Pompeo brought along her adorable daughter Stella for the fun day in the sun at the event, which helped provide Los Angeles families in need with essential baby gear and clothing for their children.

PHOTOS: Check out the latest pics of Anna Paquin

In case you missed them, check out some brand new pics of Anna and her cast mates in the upcoming fifth season of True Blood, debuting on HBO this summer!

Jennifer Garner carries her adorable daughter Seraphina up to a friend’s house on Saturday (May 5) in Pacific Palisades, Calif.

Jennifer‘s hubby, Ben Affleck, was also out and about Saturday morning!

You can catch both Ben and Jen on the big screen in just a few months! Ben‘s thriller Argo hits theaters October 12, while Jennifer‘s feel-good comedy The Odd Life of Timothy Green will be released on August 15.

Also pictured inside: Jen taking Violet and Seraphina to ballet class.

20+ pictures inside of Jennifer Garner and Ben Affleck out and about with the kids…