This was unexpected. Kara DioGuardi and Katrina Darrell sang a duet during the two-hour finale of American Idol's eighth season.
In this video, courtesy of night two in Hollywood, Katrina Darrell acts like a bitch to her teammates, while Tatiana Del Toro just acts flat out crazy. Watch and enjoy!
Katrina Darrell has earned the nickname "Bikini Girl" following her scantily-clad audition for season eight of American Idol. Here's video evidence that the model has posed in her bathing suit before. The horror!

Katrina Darrell Biography

Bikini Girl
Katrina Darrell is gonna enjoy her 15 minutes of fame. This part-time model auditioned for season eight of American Idol... in a bikini!... More »
Full Name
Katrina Darrell