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Katy Perry performs impromptu duet during ‘American Idol’ contestant Caroline Kole’s audition
Katy Perry performs impromptu duet during ‘American Idol’ contestant Caroline Kole’s audition,There's always a handful of "American Idol" contestants who make the bold choice of auditioning with a song by one of the judges, and this season is no different.

Katy Perry performs impromptu duet during ‘American Idol’ contestant Caroline Kole’s audition

There's always a handful of "American Idol" contestants who make the bold choice of auditioning with a song by one of the judges, and this season is no different.