Katrina Darrell (born 1987) is an American singer and occasional actress known as "Bikini Girl" from her first tryout on American Idol, Season 8. She lives in Chino Hills, California, and is a mix of Italian, French, American Indian, and Spanish. Darrell once worked as a Hooters girl. In the episode of American Idol on January 14, 2009, Darrell appeared in a bikini, earning the nickname "Bikini Girl." She was eliminated from American Idol on February 4, 2009.

Kara DioGuardi and Bikini Girl singing together, both in bikini, in American Idol season 8 finale.

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