Surprisingly, most celebrity women wouldn't be caught dead without wearing a pair of Spanx under their clothes. Spanx are basically just a body-shaper that women wear to tighten their bodies under their clothing.  Though, not many of them are as open about talking about it as Katy Perry.

Recently, Perry attended a gala without wearing a pair of Spanx and quickly found herself regretting it. She told a reporter that she felt fat without having them and and that she could sense some of her curves sticking out more than she'd like them to be.