After rocking the AMAs with a spine-tingling set, America's most famous teenager had an even more pressing engagement - an 18th birthday party.
Miley Cyrus blew out the candles on her cake in an LA nightclub, wearing sexy leather trousers-and-bikini combo.
Helping her celebrate was Demi Moore, husband Ashton Kutcher, plus Demi's daughter Rumer Willis.
As was her mother Tish, who put aside her heartbreak over divorce proceedings from Miley's dad Billy Ray to attend.
And the Hannah Montana star's revealing ensemble certainly caught the eye of one reveller, 18-year-old Canadian actor Avan Jogia.
He was seen snuggling up to her in a cosy corner of the disco.
And that's not the end of the partying for the teen idol, who actually turns 18 on November 23.
"I have a birthday month," enthused Miley. "I do the whole month of November."