Our annual Hottest Shirtless Bracket is under way, and the matchup between Tom Cruise and Leonardo DiCaprio is proving to be one of the most surprising — they're in the middle of the second closest race, and Leo's in the lead by just 500 votes! Leo could bare his six-pack any day now during his Sardinian vacation with Bar Refaeli, while Tom gave us a glimpse of his abs during a commercial shoot in June. It's a tough decision, but who looks hotter without his top? Make sure to select all your favorites, and you'll be in the running to win a pair of Tom Ford sunglasses! You will be entered for each round you complete, so the more rounds you play, the more chances you have to win. Check out the official rules and get voting!