Music's hottest stars were all in one place on Saturday night.
On the red carpet of KIIS-FM's Wango Tango concert at the Staples Center in Los Angeles, there was Adam Lambert, dressed down for a change (i.e. no spikes or sparkles).
There was Ke$ha, posing for pictures with an unusual guest under her arm (see below).
There was Justin Bieber, ever cuter than a button, stopping for photos with the singer who discovered him:
There was Courtenay Semel, ummm, just standing there.
There were also Twilight Saga stars, ex-boyfriends of Miley Cyrus and more. Click on the following images to see who showed up and to see what they were wearing:
[Photos: Splash News]