Gerard Butler slipped into the traditional green and white colors of Glasgow's Celtic soccer club during a match held to benefit Oxfam's East Africa charity last night in Scotland. Gerard and a handful of former Celtic stars faced off against retired players from the Manchester United, and the Scots won 5-2 in front of more than 50,000 fans. Spectators in the locker room got the real show when Gerard flexed his abs while changing. He's one of the many hot guys in this year's PopSugar shirtless bracket — stay tuned for the entire list of shirtless guys later today! The UK getaway comes in the middle of a busy month for Gerard. He kicked things off last week with Leonardo DiCaprio and Taylor Lautner at the Hollywood Foreign Press Association's annual luncheon, then landed a starring role in the FBI thriller Bricklayer, and can be seen in the newly released Coriolanus trailer. Gerard shares the big screen with Jessica Chastain and Ralph Fiennes in the film, based on one of Shakespeare's plays, though we'll have to wait until December to see it on the big screen.