ABC has announced that Paula Abdul will join the dance-competition show as a special guest judge on Monday, October 15. Abdul, whose own show Live To Dance fizzled on CBS, will join judges Len Goodman, Bruno Tonioli and Carrie Ann Inaba for one night to critique the remaining All-Star couples on their dance routines. Dancing With the Stars has struggled with ratings this season as the show brought back celebrities from previous shows, including Bristol Palin and Kirstie Alley.