For the past 14 seasons, we’ve watched them shake and sashay their sequins around the dance floor. Now, 13 past contestants—including six previous winners, two Olympic champions, two boy-banders, and a football legend—are back to compete once again for the mirror-ball trophy. Here are some of our favorites; who do you think will win Dancing with the Stars: All Stars (premiering Monday, September 24, at 8 p.m. ET)?