This article falsly states that Spanx eliminate that dreaded thing called "muffin top". The reality is, any girdle, no matter how high up the garmet goes (i.e. below the bust), or what it's made of will ALWAYS produce muffin top. I have personally tried Spanx as well as other "support undergarments" all with the same result (and, yes, I did get professionally fitted to make sure I was wearing the correct size). Muffin top will always occur with a tight garment. You just have to chose where you want it to appear, around your waist or on your back, under your armpits.
The reality is, ladies, as many people have already stated, you not only have to get your self in shape. But if you're not in the best shape already, or are sel-conscious about certain parts (as I am about a bit of a thick waist) dress to compliment your best assets and avoid bottoms that give you muffin top, like jeans that are too tigh and too low.