Apparently, J.Lo's 40th birthday party didn't run too smoothly this week, and she threw a fit when guests arrived late to the intimate sit-down dinner party. Among those in the doghouse are Alicia Keys and her boyfriend Swiss Beatz. Meanwhile, Tom Cruise and Katie Holmes blew off the event entirely to hang out with Posh Spice and David Beckham. [NY Daily News]

How rude! Sounds like some of our other conspicuously tardy celeb friends. Hell, I invited James Franco to my house three months ago and he's still not here! Here are some celebs who need watches.