Heidi Montag hosted a wet and wild Las Vegas pool party over the weekend and showed off a slender look she reportedly achieved by working out for 14 hours a day.

Montag, who famously had 10 plastic surgery procedures done in 2009, debuted her new look at Wet Republic, where she was joined by Playboy's 'Runaway Bride,' Crystal Harris.

"I've been working out from, like, 5 a.m. to 7 p.m. for two months now. I've been working out really hard because I had this pool party and I was like, I have to be in shape," Montag told Us Weekly about why she hasn't been spotted out and about recently.

"I was actually a lot overweight," she continued. "It was the most I've ever been because I've kind of been in hiding eating pie with my husband [Spencer Pratt] and puppies, so I needed to get back in shape."