Fall Out Boy: Sugar, We're Slimming Down

Beauty By TooFab Staff | 4/28/2010 3:30 PM PT

At a show last weekend in D.C., Fall Out Boy singer Patrick Stump lost his glasses, signature hat ... and a whole bunch of weight.

Here's Patrick on the 25th (left) ... and back in May of 2009 (right).

Lookin' good!