Heidi Montag Heidi Montag

Reality star Heidi Pratt is no stranger to the scalpel, and the new Playboy cover girl admits she wants even more body "upgrades."

"I'm definitely not done with my surgical quest," Heidi told Playboy, adding she wants "to go bigger on my boobs" for her reality-villain hubby, Spencer.

Watch Pratt roll around in a bikini in her "Higher" music video

While Heidi, 22, did pose nude for Playboy, only the PG-13 pics (in risqué lingerie and teeny bikinis) made it into the magazine.

"If anything, the reason I didn't show everything is because I plan to get a few more upgrades," Heidi said.

Check out photos of Pratt through the years

Spencer, 26, showed his support for his wife's work by hanging a poster-sized, nude outtakes on his bathroom wall.

"Now when I'm peeing, I get to see a 10-foot naked photo of my wife," he said.