The Teen Choice Awards are this weekend and we're checking out some memorable moments since the show's first year in 1999. From pop icons to teen heartthrobs, the Teen Choice Awards are always a good time and this year's hosts Katy Perry and the Glee guys are sure to keep the fun coming. Who knows what surprises are in store on Sunday? PopUS will be live at the event so make sure to follow them on Twitter for all the action!