Matthew vs. The World: Vote for the Hottest!

It's the war of the workouts – and McConaughey has some competition (Mario! Becks!) muscling in on his shirtless reign. Who's got more flex appeal? Vote!

MATTHEW VS. MARIO

While filming Fool's Gold Down Under, onetime Sexiest Man Alive Matthew McConaughey has been giving Queensland beachgoers a daily dose of his shirtless sun worship. Meanwhile in L.A., Dancing with the Stars runner-up Mario Lopez is giving him a run – for the hottest biceps.