Best way to instantly get rid of a muffin top is to wear pants that fit! I see so many people and I want to say to them "Just because you can do them up doesn't mean you should wear them!"
Touche! Even a slender person can have a muffin top.. it's all to do mostly with how your clothes are fitting.

There is nothing with slightly larger proportions but they look better with a little tone on them
I LOVE the figure of that shot of the add for Beauty and the Geek? Of the chick in the bikini... I mean she's by no means "fat" but she has meat on her and legs I would *die* for.