Make no mistake: Ke$ha is a wild child. The pop singer lets loose at Z-100's Jingle Ball in New York on Dec. 11, 2009.

"If you come to my live show, it's a sensory assault," Ke$ha recently told Billboard. "You will leave covered in sweat, beer, and glitter."

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Ke$ha pays homage to Michael Jackson by attending the Oct. 29, 2009 premiere of "This Is It" in London.

Singer Ke$ha attends the launch of VEVO, the world's premiere destination for premium music video and entertainmentat Skylight Studio on December 8, 2009 in New York City.

Sporting shredded jeans that could rival any rock star's, Ke$ha takes the stage at Lollapalooza in Chicago on Aug. 9, 2009.

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Ke$ha performs at the T4 Stars of 2009 show in London on Nov. 29, 2009.

Of the dollar sign tattoo on her hand, Ke$ha says, "I got it because I was being ironic...I'm money -- I don't need money."

Ke$ha on the cover of Billboard, Feb. 27, 2010.