If there was ever any doubt about Derek Hough’s domination of Dancing With the Stars, watch his powerful performance of the Argentine Tango. Hough’s captivating choreography was shockingly created during Purdy’s back injury, forcing Purdy to watch as Hough executed the moves with another partner during practice. She therefore had an extremely short period of time to prepare for Monday’s show. If you watch the video below carefully, you’ll notice that Hough designed each move around Purdy’s injury to put less pressure on her back as they performed. He’s an artist.