Well, technically Miley Cyrus won’t be the ripe age of 18 until tomorrow, November 23. But that hasn’t stopped her from celebrating the milestone in advance.  After last night’s AMAs where she gave a less the pleasant sounding performance of ‘Love and Forgiveness‘, she headed to Trousdale for a huge party in her honor.  And that’s not the only celebration she’ll be enjoying:

Miley Cyrus Has Last Minute Change for AMAs Performance Tonight

“I have a birthday month,” she told Access Hollywood. “I do the whole month of November. Thanksgiving, cake, [it's] all about me on Thanksgiving!”

Her mom Tish was her date to the party but she did end up have a little make out session with Avan Jogia from ‘Victorious’ on Nick.  No, he’s not her boyfriend, just boy toy.  Miley is having is having fun and playing the field a bit.  I think she should stay single for awhile. No need to jump into another relationship!

Another Attack on Miley Cyrus

Some of the party guests in attendance were: Demi Moore, Ashton Kutcher, Rumer Willis, Kelly Osbourne, Kyle Massey, Mark Salling and Chord Overstreet.  Amazing that her daddy, Billy Ray Cyrus somehow couldn’t make it.

Happy Birthday Miley!

Photo: Jeff Vespa/MC/WireImage