Joanna Krupa may be the sexiest swimsuit model in the world — and a Playboy cover girl to boot — but she had nothing on Derek when he performed his first ever striptease on the series, showing off his ripped pecs and rock-hard six-pack. The boy has indeed become a man.

Mya got her groove thang going in this bikini-inspired get-up for her perfect 30-scoring salsa. We also give her a 30 for this look.

Anna made the most of her substitute pro week with Mark Dacascos, giving us some crazy leg action in this shredded black number with a splash of green. (Sidenote: How hot do redheads look with green?)

Glittery gold lamé could be, well, lame, but Chelsie sizzled her itty-bitty skirt during her ultra-sultry rumba with Louie Vito.

Edyta Sliwinska is the Queen of Draping. So it makes sense for Natalie, who was paired with Edyta's hubby, Alec Mazo, to don some strategically draped dresses every now and then that perfectly flaunted her toned swimmer's bod. Too bad she didn't raid Edyta's closet for skimpier fare.

Mya stays covered up while Dmitry plays the "gratuitous skin" card, showing off his perky pecs. The leather is nice touch.

Talk about equal opportunity. Giving guys and girls a little something, Lacey dazzles with her peek-a-boo tassels, while Mark parades a, uh, what is that? A 12-pack? We could count better had he taken off that vest.

Joanna showed off some fringe benefits in this strappy, dominatrix-esque costume that was certainly busting at the seams.

Sometimes less is not more. Kelly displayed her lovely new curves in this luscious asymmetrical pink gown that definitely made us envious of her gams. Check out those calves!

Looking straight out of the wild, wild west, cowboy Mark flexed his chiseled muscles for us all to drool over. Now the question is: Does he make for a hotter cowboy than rodeo king Ty Murray?

When you think of "sex symbols," Chuck Liddell may not be the first name that comes to mind, but you can't deny the primal sexiness of a man in peak physical form ripping out of his clothes. Plus, not since Larry King have suspenders looked this hot. Wait...