Bristol Palin 'Dancing with the Stars' ABC partner Mark Ballas

Bristol Palin strips off a conservative power suit to reveal a racy red minidress on "DWTS." Photo: Adam Larkey, ABC

Hail to the dance chief!

Bristol Palin stepped out in a crystal-embellished replica of one of mom Sarah Palin's power suits during her first spin in the "Dancing With the Stars" ballroom Sept. 20.

The Candie's spokesperson, 19, was in on the ruse to sport a stuffy suit and strip it off to reveal a much sexier fringed halter minidress with a corset-style back.

The red-hot number showed off her amazing legs and sense of humor as she and partner Mark Ballas danced a cha-cha-cha to Tom Jones's "Mama Told Me Not to Come."

At first glance, however, it looked as if the teen mom had taken her threat to wear the season's most conservative costumes a little too seriously.

"I must say it was a brilliant concept," show costumer Randall Christensen tells StyleList, adding that Palin and Ballas collaborated on the idea.

"Emulating Bristol's mom -- U.S. flag pin and all -- was a fun tribute while at the same time a clever way to wow the audience with her own unique reveal partway through their performance!"

The Emmy-winning Christensen admits he was being devious.

"I wanted to trick the audience that this was her real costume and also keep the producers happy -- as this is a glitzy show -- by encrusting her suit with crystals. Hopefully enough people were convinced the suit was actually her performance costume."

The former Alaska governor and vice-presidential candidate was not in the ballroom, but tweeted that she was "over-the-moon happy and excited for Bristol" and shared a pic of family and friends watching the show in the Palin living room.

It turns out the political daughter, who works as a medical receptionist back home in Alaska, isn't a bad dancer: The judges awarded Palin and Ballas a respectable 18 out of 30 points, placing her ahead of celebrity competitors including Margaret Cho, Michael Bolton, Florence Henderson, David Hasselhoff, and Mike "The Situation" Sorrentino.

Meanwhile, read about the patriotic costume The Situation wore during his brief stint as a male stripper.