Body-Obsessed Mario Lopez Persuaded Girlfriend to Lose Weight, Have Plastic Surgery

Mario Lopez is so body-obsessed, he persuaded his beautiful girlfriend, Courtney Mazza, to undergo rigorous personal training and encouraged surgery to get her into even better shape.

Sources say friends of Mazza are concerned that the image-conscious "Extra" host started nudging her to perfect her already amazing looks once they got together. They met in 2008 while appearing together in the Broadway revival of "A Chorus Line" and started dating the next year when Mazza moved to Burbank, Calif. She's expecting their baby in September.

One source told us, "Mario is obsessed with his image. He spends a lot of time working out, and he expects his girlfriend to do the same. Even his new book is called 'Extra Lean.'

"Courtney was engaged to a guy in Queens before she met Mario, but once they got together she dropped everything to go to California and be with him," the source said. "He encouraged her to work out with a trainer every day. She underwent a boob job and liposuction last spring. Once her body was perfect, he arranged for them to be photographed on a beach."

Lopez has previously described his obsession with fitness and once told TV Guide, "I never feel awake unless I'm sweating." He told the magazine he exercises for at least an hour a day, runs, bikes, swims, plays basketball and throws punches three times a week at a boxing gym.

But he says he's overjoyed at the prospect of becoming a dad, recently telling Ryan Seacrest's radio show, "I am so excited, dude, I'm fired up! I'm like a little kid waiting for Christmas!"

Asked about Mazza's exercise regimen and surgical procedures, a rep for Lopez said, "This is silly. Mario and Courtney are very much in love and focusing on the birth of their first child."