Stars Who Lost Their Looks

Lifestyle choices turn stars from pretty to kinda gritty.

From Fox 411: "Britney Spears fell hard for [Kevin Federline,] the hard-bodied back up dancer with a chiseled face back in 2004. In an attempt to control his ever-growing waistline, the former dancer joined the cast of 'Celebrity Fit Club' in early 2010. When the show started he tipped the scale at a whopping 240-lbs. Unfortunately, it seems as though the diet ended as soon as the show did."