Kara Dioguardi's Bikini Pics from American Idol

Vision of Nubs During "Vision of Love"

Last night, American Idol viewers got a big surprise when nearly Katrina Darrell AKA “Bikini Girl” returned to the Idol stage, where she was a favorite among the male judges for her barely-there attire, and was joined by a nearly naked Kara DioGuardi.

Seeing Katrina trot out in her two-piece was no surprise, nor was the tingling sensation that accompanied it.

The real shocker was when Kara herself, the Idol judge and the way-too-hot-to-be-behind-the-scenes songwriter came out on stage in the middle of Darrell’s rendition of Mariah Carey’s "Vision of Love" and began to blow.

After outsinging her rival, Kara then took on Katrina on her own turf, ripping open her dress to reveal her stunning and sculpted body in a bikini whose skimpiness was a match for the would-be singer.

Judging by the audience reactions, Kara, who pulled the sexy stunt after Idol producers donated money to her favorite charity, has a built-in fanbase if she decides to transition into bikini, or better yet, nude modeling.

And if she wants to keep raising money for charity, here a few: International Alliance for the Prevention and Treatment of Wrist Injuries, The Petroleum Jelly Manufacturers of America Association’s “Lube for Dudes” Drive, and the North American Man Hand Love Society.

Any other suggested charities? Leave them in the comments!

And don’t forget to follow MrSkin on Twitter to keep the party going like Lionel Richie did… all night long.