If you’re Miley Cyrus, you party it up at a big Hollywood party with all your celeb pals. 

And of course, a unicorn must be in attendance too. Say what? Read on.

Superstar Miley Cyrus’ best friend Kelly O threw her Hannah Montana friend a big Hollywood party to ring in her 19th birthday. The ‘adult bash’ was held inside the Beacher’s Madhouse club at the hip Hollywood Roosevelt hotel in LA and according to E! and other sources, Cyrus’ beau Liam Hemsworth, dad Billy Ray, mom Tish, sister Brandi and pals Victoria Justice, AJ and Aly Michalka, and Justin Baldoni were all in attendance.

Days before, party-planner Osbourne wasn’t lying when she promised there would be lots of “madness and craziness” at the party. At one point during the night, a unicorn was spotted strolling around outside the soiree. Of course it wasn’t a real magical creature. Just a horse with a horn attached to its head.

“It’s intimate, but it’s going to be the sickest thing she’s ever seen in her life,” Osbourne teased just hours before the big bash. “That was my mission for her, to make her birthday…the best day ever.”

After, Miley tweeted: “Can’t thank @MissKellyO for the best partyyyy ever! =]]]] i loveeeee you! Let’s just say there was a unicorn in the lobby!”