02 September 2009
Fall Out Boy's Pete Wentz was left red faced on the weekend after his pants fell down while he was performing on stage, exposing his blue boxers to the crowd!
Pete was singing with bandmate Patrick Stump at the Leeds music festival in the UK when his wardrobe malfunction occurred.
Watch Fall Out Boy's 'Thnks Fr Th Mmrs' Video!One of the bands' production assistants ran out on stage and swiftly yanked Wentz's pants back up before they fell all the way down!

According to witnesses, Pete was so busy singing he didn't even notice!
IMAGES VIA WENN.COM