Credit: Jon Kopaloff/FilmMagic

The highlight of Bristol Palin on Monday's Dancing With the Stars premiere?

Ripping off her coat to show off a sexy red dress.

"That was my favorite part!" she told after the show.

"Leading up to it I was pretty nervous, but once I pulled the jacket off it was all good!"

VIDEO: Watch Bristol Palin's dancing debut 

Added partner Mark Ballas, "I think that's when things kicked in, and she was like, 'Ok, let's go!'" They scored a decent 16 out of 30 for their cha cha. Judge Len Goodman told her she had some good "hip action."

Said Bristol, 19, "It's good that we're going in the right direction, but we've still got a lot of work to do."

Ballas, 24, told Us he was "pumped because if you saw the first day to now - her improvement is crazy! She's the most improved and we are so happy. I'm really proud of her."