Hollywood's waist size is becoming increasing small.

While super skinny stars are nothing new, more and more are revealing waists that are shockingly small. Of course, we have the waist trainer to thank for that.

RELATED: Guys Try on Waist-Trainers — And It's the Funniest Thing You'll See All Day!

Click through the gallery to see stars whose mid sections, sans waist trainer, will make your jaw drop.