Dancing with the Stars: Behind the Scenes!J.R Martinez wigs out! Rob Kardashian & Derek Hough re-enact Lady and the Tramp! See how the contestants goof off when they're not on the parquet!

PHOTO BOMB

While Cheryl Burke and Lacey Schwimmer bring the sexy for this shot – Mark Ballas has other plans. "Damn you @MarkBallas me and @CherylBurke were really trying to work it!" Tweeted Schwimmer.