A music producer selects Bart, Nelson, Milhouse and Ralph to be members of the next hit boy band, who record subliminal songs about joining the Navy.

A medley of songs from some of the most popular boy bands and girl groups in history; the six remaining couples compete; guest judges Emma Bunton and Joey Fatone.

The 10 remaining celebrities discover that two may be company, but three is definitely not a crowd as former show stars, as well as some newbies, join the couples for…

In the season opener, previous contestants return and perform the cha-cha or the fox-trot. Competitors include Kirstie Alley, Emmitt Smith, Bristol Palin, Drew Lachey and Shawn Johnson.