Another week, another two dances on Dancing with the Stars. Following last week's group hustle, the remaining nine couples will face off in a mambo marathon on top of their main dance. How did they fare? Find out below!

This week is what you call sadism in the ballroom. Five days, three dances. Everyone has to learn a main dance, a knockout dance in case of elimination and the mambo for the much-ballyhooed inaugural mambo marathon. That will either be a hot steaming mess or completely awesome.

Mya and Dmitry Chaplin: Jitterbug
Mya's aiming for a 30 and wants to make up for the lack of emotional connection in her Argenine tango. She complains of pain in her hip, so she goes and gets a back massage. Makes sense. How many gratuitous shots of her unclothed back did you count? I got four. In any case, that made everything better. After cleaning off the judges' table for what feels like a day and a half, Mya hits the floor and hits her steps as usual, but there's something missing here. I'm not sure what. It seems like she's almost going through the motions. Plus, she's trying way too hard with the jolly character that it's kind of off-putting. Len didn't think the feather-dusting props were necessary because they wasted 20 bars. "Cleanliness is next to godliness," Bruno says. Also godly? Her timing, he says. Carrie Ann thinks it was too soft and muted.
Score: 24

Melissa Joan Hart and Mark Ballas: Waltz
Melissa thinks it's time to get serious, but cannot get the posture right. So Mark and his Tower of Hair bring in mama, Shirley Ballas, to help her out. If Shirley gave Melissa advice, then it went in one ear and out the other. This is just awkward to watch. There's an elegance needed in the waltz and Melissa looks like a horse plodding around the floor. There is no fluidity or smooth glides. The posture is OK, but she looks stiff throughout and attempts a split in the middle. Is that in honor of Natalie? The bright side? Mark cut his hair. Bruno doesn't think it was good and says she got her feet in a jam at the end. Carrie Ann likes that she kept her puppies up, but agrees with Bruno. Len thinks it had musicality, loves the changes in the hold, and calls out his cohorts for being harsh. Pot, kettle.
Score: 20

Mark Dacascos and Lacey Schwimmer: Jitterbug
Matador Mark felt "horny" with his 26 for the Paso Doble last week, but now he's got to have some fun. Lacey takes him to a jitterbug club to help him get into character. "Jitterbug is not a dance; it's an attitude," a jitterbugger says. Mark's definitely got the 'tude down. This is the best performance of the night so far. He's got the boiterous energy down and is keeping pace with the frenetic movements. On top of that, he nails some tricks and gets some massive air on his flips. It's also nice to see him completely let loose for once. Carrie Ann tries to raise the roof, I think. Please don't do that anymore. Needless to say, she loves it. Len, ditto. Bruno calls it "spectacular," especially since he kept up with the "crazy kitty." He notes the stumble at the end.
Score: 26

Aaron Carter and Karina Smirnoff: Waltz
Aaron comes to rehearsals in a suit and with roses for Lady K to show his commitment. "I think you should come in a suit more often," she says. Preferably, a velvet green jacket. Once you get past that and Aaron's untamed hair, you see this is actually a pretty great routine. It's soft and romantic, and his posture and frame are perfect. He seems hesitant on some of the footwork, but the plethora of spins he does are gorgeous. It's certainly a more sophisticated A.C. on the floor. Len says he danced with maturity and calls it his best dance. Bruno says the boy has become a gentleman, but points out he lost his footing a few times. Carrie Ann calls it beautiful and loves the new Aaron Carter.
Score: 25

Michael Irvin and Anna Demidova: Waltz
No nickel up the butt this time......