American Idol: Ke$ha, Orianthi To Perform On This Week's Results Show

Now the party don't start 'til she walks in: TiK ToK singer Ke$ha will bring her breakout act to the American Idol stage Wednesday, where she will perform her new single, Blah Blah Blah, RadarOnline.com has learned.

In addition, Australian up-and-comer Orianthi will perform her single, According to You, on the musical marketing machine, as well.

Wednesday's episode will reveal the rest of this season's hopefuls (Didi Benami, Crystal Bowersox, Lacey Brown, Lee Dewyze, Andrew Garcia, Casey James, Aaron Kelly, Michael Lynche, Siobhan Magnus, Paige Miles, Katie Stevens and Tim Urba) as they perform songs from the Rolling Stones' catalogue.

Wild horses won't be able to tear us from our screens this week, when American Idol airs on Fox Tuesday at 8/7c and Wednesday at 9/8c.