Miley Cyrus Teams Up With Drag Queen for New Song (PHOTO)

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Miley Cyrus gave clubgoers more than they bargained for on Saturday when she teamed up with a drag queen to sing “Happy Birthday.”

With a number of birthdays — including famous drag queen Vickie Vox’s — in the house at the 19-year-old’ favorite Hollywood hang out, Beacher’s Madhouse at the Roosevelt Hotel, Cyrus surprised everyone by jumping up and singing.

The newly engaged Cyrus belted out a birthday tune giving a special shout out to her friend, and performer at the club, Vicky Vox.

How did the club react?

“It was ridiculous,” said one of the party’s attendees. “She normally keeps to herself but she just jumped up, as there were like three birthday people on stage — it was so fun.”

Singing loudly into the microphone Cyrus did her own take on the famous birthday song.

“Happy birthday to Vicky Vox, with those big ole big t**ties … happy birthday, Vicky Vox.”

The former child star dressed down for the occasion, wearing a white midriff t-shirt and her now infamous bottom-flashing super short denim cut-offs.

Happily posing for pictures, Cyrus looked like she was having a great time, despite fiancé Liam Hemsworth, 22, — who is currently filming Empire State — not being with her.

Cyrus and her Australian beau have now been engaged for over a month. The “Party in the U.S.A” singer couldn’t be happier, taking to Twitter often to express her love for Hemsworth.

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Who would you love Miley Cyrus to do a duet with? Have your say below.