Entourage‘s breakout star (finally!) Jeremy Piven will be 41 tomorrow, but he’s already started celebrating. There was a birthday party at a Malibu beach house a couple of days ago, which of course found little miss Lindsay Lohan in attendance, and in a nude bikini. (She really needs to stay home one or two days a week.) Piven looks a bit non compos mentis, like, What’s this brown thing in front of me and who’s that guy next to me and oh wow is that redhead naked? And Piven’s upper body? Those party abs of his have preceded his HBO series in the UK. Not bad for a 41-year-old. Lohan looks good for 41, too. (via splashnewsonline)

UPDATE: Splash News has urgently asked us to take down the photos of drunken shirtless Jeremy Piven celebrating his birthday. So we have.