And he's just getting started!
Get the rundown (below):
She's all grown up!
Miley Cyrus got turnt up for her 21st birthday after flaunting her pussycat at the American Music Awards last night and the Beachers Madhouse shin dig at the Hollywood Roosevelt Hotel was for mature audiences only.
Her stripper friendzies were also invited to twerk nekkid for the birthday girl!
Hey! It wouldn't be a Miley party without some booty popping, right??!
Oh and eXXXtra special guest, Dr. Suess' The Lorax was also in attendance…
..we're guessing to bust out some rhymes??! LOLz!
Happy Birthday again, baby!