Katy Perry pants SPLIT during performance

Katty's pants SPLIT wide open in a wardrobe malfunction on Monday's episode of American Idol.

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KATY Perry's live performance of Teenage Dream quickly turned into a nightmare.

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Katy, 37, ripped into a surprise rendition of her 2009 hit Teenage Dream

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The hitmaker paired the lyrically appropriate pants - the No. 1 single mentions "skintight jeans"

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She was accompanied by judges Luke Bryan and Lionel Richie who sang along with piano backing until the tear.

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As Katy sang the "skintight jeans" portion of the song, a RIP was audible as she bent down crooning.

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Luke, 45, yelled, while the contestants started to laugh and pointed and a show logo covered up the evidence.

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Katy then begged for assistance, cutting the song short and asking "can I get some tape - some gaffer tape?"

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The star then remained bent over the judge's table as crew as well as Luke began taping up her red pants with yellow tape.

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Katy then continued on with the show as a large yellow T of tape could be seen across her rear end

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