It's been 100 degrees in El Lay for the last week, WHY is Pete Wentz wearing that sweatshirt!?
The Fallout Boy rock star was spotted leaving Runyon Canyon in Hollywood after a hike with a buddy on Thursday.
He wore a pair of brown cuttoff shorts and a camouflage patterned hooded sweatshirt.
Is he trying to sweat out some extra water weight or does he just enjoy torturing himself?
[Image via Ability Films.]