Heidi Montag has said that she has been undergoing 14-hour intense workout sessions over the past few months to get her body in shape for the summer.
While attending this weekend's Las Vegas Wet Republic pool party, Montag revealed that it was the first time that she has been photographed in a bikini since April 2010.
'I've been working out from like 5am to 7pm for two months now," Montag revealed to Us Weekly. "I've been working out really hard because I had this pool party and I was like, I have to be in shape."
Montag said that since undergoing a series of plastic surgery procedures at the end of 2009, she has been laying off exercise and had put on a lot of body weight as a result.
"I was actually a lot overweight," she claimed. "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."
Montag added that she lost 27 pounds as part of her extreme fitness workout, which included both cardiovascular exercise and lifting weights.
The former star of The Hills will next be seen in VH1's new reality series Famous Food, despite recently insisting that she wants to have more privacy in her life.