Now that Heidi Montag has a Playboy spread under her belt, the reality star is ready to take the next step – getting more plastic surgery.

“The Hills” star opened up to Playboy, in an interview conducted by her husband Spencer Pratt, about her newfound desire. While she has had breast augmentation and a nose job, she has plans to “get a few more upgrades.”

“I think I want to go bigger on my boobs for [Spencer],” Montag said.

The wannabe pop singer also said she turned to the famous mens mag when deciding what kind of fake breasts would be best for her.

"When I was shopping for my boobs, I wanted the best, so I sat down and flipped through a bunch of Playboys … I’m sure as I get older I’ll need some touch-ups”

PHOTOS: Click here to see photos of Heidi Montag and husband Spencer Pratt.

At the premiere of "G.I. Joe" last week, Heidi and Spencer posed with the September issue of Playboy, which features her on the cover in a white bikini and some strategically placed dirt. While she said it was a dream of hers to be a sex symbol, Montag did not pose nude, perhaps due to her “strict” Christian faith.

But while critics slammed the couple for their publicity pose, Montag don’t seem to sweat the negativity.

“If women aren’t jealous of you, talking about you and cutting you down, then you’re a nerd, and I would never want to be that,” Heidi said.