Katy Perry has revealed a family secret Katy Perry Wed-27-Jun-12 17:56 Share this KATY PERRY opened up about a family secret during a late-night TV interview on Monday, revealing her good-girl sister was once sent away to school in Arizona after she was caught with stolen lingerie. While explaining where her love for all things Japanese started during an appearance on Jimmy Kimmel Live!, the pop star let it slip that her big sister was once banished by her religious parents for stealing from a department store. The I Kissed a Girl hitmaker explained, "She's like the angelic figure; she's very perfect and sweet... She's sinned maybe once in her life and that one sin had her kicked out and moved to Arizona, because she stole, like, a bra and panty set from Macy's. "She had to go and live with, like, another family... for a couple of months." Perry then realised she had been too candid and added, "She probably doesn't like me telling you this on live TV." And the star added, "She's such a good girl. She's the oldest child and she's, like, my warden; I'm the one that's doing all the sinning." WENN.com You May Also Like See John Mayer and Katy Perry’s First Portraits Together - Photos Katy Perry 'Unconditionally' - the video Katy Perry's dramatic 'Unconditionally' video - the teaser Become a fan of The Edge on Facebook and on Twitter .