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'American Idol's Katy Perry, Luke Bryan and Lionel Richie Share One Another's Most Annoying Traits (Exclusive)

The 'American Idol' judges dished it in an exclusive sit-down with ET ahead of the premiere of their 7th season together.

Katy Perry, Luke Bryan and Lionel Richie will soon begin their seventh season together as judges on American Idol, and by now they've learned a lot about each other, including one another's most annoying traits. Speaking exclusively with ET's Denny Directo ahead of the popular reality singing competition kicking off its 22nd season, the trio didn't shy away from airing it all out during ET's "Sip or Spill" segment. When asked to dish on their most annoying traits, the judges didn't sip and instead got downright candid, and Richie joked that Perry "has a book she can write."

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