Credit: Chris Polk/FilmMagic

Forget being the next Britney Spears! The Hills' Heidi Montag has a new celebrity aspiration.

"She said she wanted to be the next Octomom!" Hills star Audrina Patridge told at the Surfrider's 25th Anniversary Gala on Friday in L.A. "I was like, 'Heidi, no you don't!'"

(Octomom Nadya Suleman -- who, after having octuplets in January, is raising 14 kids on her own -- told Us this summer that "it was a mistake" to have so many children without a father figure.)

Patridge told Us that Montag, 23, is "ready for kids," but her husband of five months, Spencer Pratt, does not want to start a family just yet, if ever.

On The View this month, Pratt, 26, said he wasn't sleeping with his wife because she keeps trying to get pregnant. "She [says] she is not going to tell me she is going to go off her birth control," Pratt had said.

Patridge, however, isn't concerned that the clash might cause them to split. They are "bickering back and forth, like a married couple does," she told Us.

In fact, she said their marriage has made them a stronger couple.

"They're really close," Patridge told Us. "They're inseparable. I think if anything, it's helped them in a lot of ways."