Well, apparently Sienna Miller really enjoyed that ck in2u party. In a few short hours, she went from cute, polished and put together to, well, drunkenly cheering on her boyfriend's band, hair akimbo, in a stranger's hat. I made that stranger's hat part up, it could have been a friend's. Meanwhile, looks like Jamie got his hands on some blue eye make-up in between the party and the stage. I got no problem with Sienna being young and living it up, though I gotta say her (and Kate's, and Courtney's and Lindsay's...) choice of men leaves a little to be desired.
To see more of drunk Sienna supporting her man just read more