Some people think that Alyson Hannigan, famous band camp girl, had an almost undetectable nose job. Her rhinplasty, if she had one, was so subtle that you would never in a million years think she had one (if you didn't see her before). The lighting makes her nose look a lot bigger than it really is (right picture), so it's hard to compare it. But, there's still enough of a difference that you could make a case for it.
Again, Alyson Hannigan's nose looks pretty big before and after the alleged nose job. This one goes in the unresolved pile... But, we do know for a fact that she had breast implants.