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!

PARTY ROCKERS

Every day he's paso doble-ing! Maksim Chmerkovskiy teamed up with guests LMFAO for this shot when the group made a special appearance on the dance competition.