The popstar will appear on American Idol's results show on Thursday, April 26 to sing her latest hit 'Part of Me'.
Next week's performance will mark Perry's fifth appearance on American Idol in the last three years.
LMFAO were the music guests on last night's episode of the Fox reality show, which also saw 20-year-old Colton Dixon eliminated after falling into the bottom three with Elise Testone and Hollie Cavanagh.
Ryan Seacrest also kicked off last night's American Idol with a tribute to the late Dick Clark, who passed away on Wednesday (April 18) at age 82.
American Idol continues next Wednesday at 8/7c on Fox.
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Watch Katy Perry's 'Part of Me' music video below: