Julianne Hough Ripped Her Pants Breakdancing With Justin Theroux

Julianne Hough; Justin Theroux  Jason LaVeris/FilmMagic; Gregg DeGuire/WireImage

Julianne Hough's competitive spirit sometimes gets the best of her. During an appearance on Chelsea Lately Feb. 14, the Safe Haven star revealed that she's ruined three outfits in the last two months because of her intense dance moves.

Host Chelsea Handler, 37, told Hough she'd heard about her breakdancing competition with BFF Jennifer Aniston's fiance, Justin Theroux, during Ellen DeGeneres and Portia de Rossi's joint birthday party in late January.

"I don't know if you won, but I know that everyone at the party won because your pants split right open," Handler quipped.

"There's a theme, actually," the 24-year-old ex-Dancing With the Stars pro explained. "I ripped my dress at the Golden Globes because I was dancing too hard. I actually went to Minneapolis on tour for Safe Haven, actually, and we went to a strip club — Sasha actually split my pants. That's a whole other story, wow! And then we went to Ellen and Portia's birthday party. My skirt was kind of ripping a little bit, and Justin Theroux wanted to do breakdancing. I had a little alcohol in my system and I was like, 'You wanna go?' So Portia was running around the house trying to find some pants. I put some pants on and we went at it."

Hough also spoke about her dance battle with Theroux, 41, with OMG! "Jen and [Ryan Seacrest] were just watching us like, 'What is happening?'" she recalled. (Theroux showed off his breakdancing skills in the 2001 comedy Zoolander and during a February 2012 appearance on The Ellen DeGeneres Show.)

Dating since the spring of 2010, Hough said her 38-year-old boyfriend isn't intimidated by her dancing skills. In fact, the American Idol host often surprises her with a few moves of his own. "It's not good, but I mean, he does do it. He's really fun, you guys!" she said on Chelsea Lately. "I know he's Mr. Perfect on TV and everything, but he's really, really fun."

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