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Despite completely transforming her face, Audrina Patridge insists she hasn't had any plastic surgery.

"People think I've got my nose done. My chin done. I just laugh at it," she tells "Extra." "I'm just losing my baby fat; everyone grows up and changes."

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"There's always rumors," she adds. "People are always going to point things out and it's entertainment. It's funny. Doesn't bother me. Goes in one ear, out the other. I read it, forget it."

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The 23-year-old Patridge, who is currently shopping around her own reality show, also says she understands Lauren Conrad's decision to walk away from "The Hills" after the show's current fifth season.

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"We were all pretty much ready to branch out. Go our separate ways," she says. "We feel like it's run its course."