Mark Wahlberg was shirtless yesterday for a walk along the beach in Hawaii. He's off in the tropics with his family getting a fun start on the New Year. Mark started 2013 on a high note — showing off his six-pack — and also found himself listed among the best shirtless moments of 2012. We'll see lots more of Mark's muscles in the coming months. He stars as a bodybuilder in the upcoming movie Pain & Gain opposite Dwayne "The Rock" Johnson — check out the Pain & Gain trailer before the film opens April 26. One of Mark's older films, Ted, is still experiencing a great deal of popularity and was among the most rented DVDs at the end of 2012. Mark decided to give something back after his successful 12 months. He recently donated $10,000 to a youth center in Malden, MA, not far from his hometown of Dorchester.