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Jeff Kravitz/FilmMagi
2011 MTV Video Music Awards
From her candy-color costumes to her rainbow hair, this "California Gurl" is always having fun on the red carpet. But she can also bring the glam when she occasion presents itself. Click in and check out Katy's most fabulous looks ever!
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Frederick M. Brown/Getty Images
2010 MTV Video Music Awards
3/10
Michael Buckner/Getty Images
2010 Vanity Fair Oscars Party
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James Devaney/WireImage
2010 Volkswagen Launch Party
5/10
Rick Rowell/ABC
2011 American Music Awards
6/10
Dave Hogan/Getty Images
2009 MTV Europe Music Awards
10/10
Kevin Mazur/Getty Images