Heidi Montag drops to 103 pounds with 14-hour workouts

Jun 20, 2011 at 12:22 p.m. ET

Heidi Montag isn't one to take the onset of bikini season lightly. The reality star, famous for her plastic surgery habit, spoke about her intense gym routine in preparation for this past weekend's Vegas pool party.

After being a daily tabloid staple, Heidi Montag and Spencer Pratt quietly dropped off the radar last year. Turns out Heidi spent that time at home, dining on pie and fried chicken. A return to the spotlight in a bikini had her hitting the gym -- hard!

Heidi Montag told Us Weekly, "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.'"

The 5-foot-2 party girl continued, "And I was actually a lot overweight. It was the most I've ever been because I've kind of been in hiding, eating pie with my husband and puppies, so I needed to get back in shape."

Heidi Montag, who had 10 cosmetic surgery procedures done in one day in 2009, claims her highest weight was 130 pounds. After her all-day gym workouts? She's down 27 pounds and weighs just 103 pounds... with size F implants.

"My breasts, because they're so big, really needed some time," Heidi Montag explained of taking a year off from working out after her surgeries. "So I'm just starting to work out again after my surgery. Sometimes I get shooting pains, but I hear that's normal."

Also in Vegas at Sin City's Wet Republic on Saturday was Crystal Harris, Hugh Hefner's runaway bride. Booze, bikini babes and a heap-load of drama -- sounds like a Vegas party!