Katrina Darrell ( born 1983 ) is a U.S. actress , model , fashion designer and singer known as '' Bikini Girl '' from her first tryout on American Idol , Season 8 .
Katrina Darrell ( born 1983 ) is a U.S. actress , model , fashion designer and singer . 
 She is also known as '' Bikini Girl '' from her first tryout on American Idol , Season 8 .