The usually covered-up singer opted to wear a short shorts playsuit by designer Mary Katrantzou.
In a change of pace, Miley Cyrus was more modestly dressed in black leather pants and crop top.
Amber Rose, however, outdid them both, wearing a series of chains and little else.
Other standouts of the evening included Jennifer Lopez, Rita Ora, Kim Kardashian and Katy Perry. Click through the gallery above!