Jennifer Aniston cultivates an easygoing, no-worries persona that might be summed up by the name of her latest rom-com, 'Just Go With It.' But that doesn't mean she isn't starstruck by certain Hollywood hard bodies.

On Friday, her 42nd birthday, the famously fit actress called into Ryan Seacrest's radio show and claimed that her own six-pack can't compete with the enviable midriff of Nicole Kidman. The two compared abs when Kidman visited the 'Just Go With It' set to film a cameo.

Aniston said, "I walked up to [Kidman] and I said, 'I'm sorry, can I touch them? I have to touch them....Is that spray-painted? What is that?' I think it's an eight-pack."