Katy Perry and Kanye West stopped by American Idol last night to perform their huge hit single "E.T." The duo pulled out the stops, delivering a gravity-defying sci-fi spectacle in which West seemed to float around while rapping his intro verse and Perry appeared as some kind of space princess surrounded by dancers in freaky alien costumes. When West returns to the stage dressed up in an outrageous fur vest near the end of the song, he still looks ordinary in contrast with Perry and her intergalactic dancers.

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