The twenty-first season of Dancing with the Stars is premiered on September 14, 2015. Tom Bergeron and Erin Andrews returned as hosts. Carrie Ann Inaba, Julianne Hough and Bruno Tonioli returned as judges. After 20 seasons as a judge, Len Goodman will not be returning this season. This season set records for the total number of perfect scores awarded (23) and the number of stars to receive at least one perfect score (7). Irwin also set a record with 8 perfect scores and joins Shawn Johnson (who was also 17 at the time of her win) as the youngest winner of the show.