Katy Perry is committed to her role as a judge on American Idol, and to prove it, she’s showing off something a lot of us would be too shy to reveal.During the latest episode of the competition series on Sunday, April 4, the “California Girls” singer chose an unexpected way to explain how contestant Cassandra Coleman’s latest performance made her--and her body--feel.After the contestant sang “Apologize” with Ryan Tedder, the new mom was so moved, she needed to provide a visual aid to prove