Exclusive: Heidi Montag Will Enlarge Breasts AgainExclusive: It seems Heidi Montag's 13 plastic surgeries weren't enough, after all -- Spencer Pratt says his wife wants to enlarge her breasts again, the new issue of Life & Style reveals.

"She wants to do it within the next two months and film it for the new TV show she and Spencer have been pitching to cable networks E! and Oxygen," an insider tells the magazine. "She feels forced into it, because she didn't get what she wanted last time. She's not going to be satisfied until they're bigger."

The kicker? "Heidi's purportedly looking to have the surgery done in Europe rather than by an American-board-certified doctor," the mag reports.