She may be the most famous yo-yo dieter in the world.

Kirstie Alley, who has gone from sexy barmaid to "Fat Actress" and back again, is once again slimming down before the nation's eyes on "Dancing With The Stars."

In fact, the 60-year-old "Cheers" alum claims that she's danced her way down to a size six.

SODAHEAD SLIDESHOW: See the sexiest plus-sized stars.

"I bought these dresses from a size 12 to a two. Tonight I’m a size six. When I’m a two, I’m done, people!" she recently said, adding, "The real size I want to be in is probably a four or a six. That’s where I look best."

Click here for more Kirstie Alley photos from X17 Online.

Photos of Alley arriving at dance rehearsals on Wednesday in a pair of leggings prove that she's definitely slimmed down, but suggest that she may not be quite the size six she claims to be.

From Alley to Christina Hendricks to Snooki, let us know: Which plus-sized star is the sexiest?