Bristol Palin Diet Leaves 'DWTS' Cast Gushing

While Lady Gaga, 26, is launching a Body Revolution, Bristol Palin, 21 — who has returned to ABC's Dancing with the Stars for the All Stars season after a less than stellar run in 2010 — is revolutionizing her body, following in the footsteps of many DWTS alumni, including Kirstie Alley, 61, who also returns to season 15 of the ballroom dancing reality program.

Though Palin's score on Monday night was one of the lowest of the group, which includes only return dancers — some of whom, like Gilles Marini and Emmitt Smith, fared quite well their first times around — neither she nor dancing partner Mark Ballas have anything bad to say about the new look Palin has debuted, which Ballas claims is actually helping her moves. "It's definitely a step in the right direction," Ballas told The Hollywood Reporter. "She looks amazing, and I definitely can feel it when I move with her. She's more smooth."

Despite Palin's low score of 19 on Monday night, she was not voted off the program (which is more than can be said for Pamela Anderson, whose cha-cha earned her a low score of 17), and the judges also had nice things to say about the performances her new slighter figure might lead to. Carrie Ann Inaba, for example, called Palin the "most improved" of the returning group.

"I was thankful that Carrie Ann acknowledged that," Palin, who starred in the reality series, Life's a Tripp, between her two DWTS seasons, said. And she gives herself credit for her new bod, too. "I'm definitely in better shape than I was last time, definitely," said the young mom of son Tripp, 3. "I'm just more active and I cut all the crap out of my diet! It's that simple," Palin told Us Weekly. "And my kid's a lot more rowdy, a lot more active. I'm running after him a lot! He's huge! He thinks he's a teenager already."

Palin also revealed that some of her dancing improvement may have to do with a newfound sense of confidence, which her mother, former governor of Alaska and reality star of Sarah Palin's Alaska, Sarah Palin, can see when she watches Bristol dance. "She's just excited to see a new confident me, and she's happy to be here to watch. I think it's just my age. I was 19 and now I'm 21, almost 22," Bristol told THR.

Watch Palin and her new body shake it with partner Ballas here:

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For more on Bristol Palin and Dancing with the Stars:

Pamela Anderson First To Kicked Off 'Dancing With The Stars: All Stars'

Gilles Marini Wows On 'Dancing With The Stars: All Stars'; Palin, Alley, Anderson Flounder

Maksim Chmerkovskiy To Leave 'Dancing With The Stars'

Hope Solo Accuses Maksim Chmerkovskiy Of Slapping Her On 'Dancing With The Stars'

RECAP: Roshon Fegan, Melissa Gilbert Eliminated From DWTS

Melissa Gilbert Absent From 'DWTS' Despite Improved Condition

VIDEO: William Levy Lands Perfect Score On 'Dancing With The Stars'

VIDEO: Bristol Balin Loses DWTS

Bristol Palin Bombs On 'Dancing'

Bristol Palin Purchases Home In Arizona

Bristol Palin: 'I Got Played' By Levi

Bristol Palin Wants Levi's Cash

Bristol Palin Collecting $30K For Speaking