The massacre in Norway, which has left at least 90 people dead, elicited plenty of celebrity commentary via Twitter.

Celebs reacted to Amy Winehouse's shocking death on Saturday, saying goodbye and sending their condolences.

Troubled British singer Amy Winehouse has been found dead in her London home, the Daily Mail, the BBC and Sky News are reporting.

Just a week after announcing what is, thus far, the year's most shocking breakup, Jennifer Lopez is back to work, says US Weekly. Newly single after her split from Marc Anthony, her husband of seven years, Lopez has descended on Atlanta to film her ensemble flick What to Expect When You're Expecting, co-starring Elizabeth Banks and Chris Rock. And later, of course, American Idol presumably beckons.