Jeremy Piven: I Accidentally Crashed Britney Spears' Party

So what was Jeremy Piven doing at Britney Spears ' circus-themed 27th birthday party Tuesday night? Even he doesn't know. "I'm really embarrassed -- I didn't know it was Britney's birthday party! I think I was the one guy who didn't know!" he told Usmagazine.com Wednesday at a party for Common's Capsule Line with Software by Microsoft. Check out Polaroid photos from Spears' party! Piven told Us he went to the club "to say hello to someone" when he noticed the club had been transformed into a circus tent, complete jugglers and even a man on stilts. "I was confused!" said the Entourage star, who finally figured out the reason for all the commotion. Look back at Britney Spears' crazy year. So did he get to wish Spears a happy birthday? "I did not speak to the birthday girl," Piven told Us . "I fortunately have nothing to report." (link)