The largest cast to date takes the floor for the ninth season of ABC's hit competition series. Tom Bergeron returns as host, with judges Carrie Ann Inaba, Len Goodman and Bruno Tonioli. Professional dancers team with celebrity contestants to learn and perform a variety of dance styles -- everything from the cha-cha to salsa and jive. This season marks the introduction of four new dance styles as well: The bolero, the Charleston, the two-step and the lambada. At least one couple is eliminated each week, though in some weeks more than one couple will be sent home, and the winning team takes home the coveted mirror ball trophy.