'DWTS' Sweats 80's Night with Richard Simmons

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Richard Simmons marked his return to Dancing with the Stars last night, but for this round, the authority in all things to do with Sweating to the 80's traded in his mentoring gloves to lend his energy and enthusiasm to the cast as they hung up their dancing shoes backstage.

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Although the judges were a bit rough, they delved out some of the highest scores of the competition. J.R. and pro partner Karina Smirnoff earned 28 out of 30 points, rocketing J.R. to "Fred Astaire" status in Simmon's esteem.

Despite receiving the lowest scores of the night, Carson Kressley and partner Anna Trebunskaya retained their trademark gusto after the show; the duo gave Richard a run for his money in an enthusiastic, 3-way cheerleading exercise.

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Rob Kardashian and Cheryl Burke worked a super-sexy rumba, achieving 25 points and therefore bounding the duo into 2nd in a tie with David Arquette. Rob couldn't help but be proud of his achievement, although he did concede to being somewhat inspired by Richard's affinity for tank tops, in the end hoping to whittle his already rapidly slimming bod into Simmon's shape.

Check out all the backstage shenanigans right here, and don't miss an all-new Dancing with the Stars airing tonight on ABC.

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Tune in for the results show to see who stays and who goes!