May 25, 2016  

Video: Katy Perry and Kanye West's Performance on 'American Idol'

April 22, 2011 (3:29 am) GMT
The 'Teenage Dream' singer channels her inner alien and brings Kanye to her sci-fi performance of the FOX singing competition.

appeared on the Tuesday night, April 21 result show of "" as the queen of alien. Accompanied by her "extraterrestrial" dancers, she wore a white crown, a long cape, and a form-fitting bodysuit which flickers with pink LED lights.

Her sci-fi set kicked off with a scene in "E.T." music video. Green laser beams were filled the dim-lit stage as Katy appeared before the audience and proceeded to sing her recent No. 1 single. Halfway through the performance, she was joined by Kanye and then ushered to a throne-like cage.

"American Idol" sent home Stefano Langone this week. Beside having Katy Perry's performance, it also saw showcasing his brand new single "The Last Goodbye", and the "Idol" cast covering 's "Hey, Soul Sister" as well as 's "Viva La Vida".

"E.T.":



"The Last Goodbye":



"Hey, Soul Sister":



"Viva La Vida":



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