Justin Bieber is reportedly a bit of an undercover beefcake when it comes to lifting weights. The 17-year-old heartthrob, who is dating Selena Gomez, can apparently hold his own on the weights bench, despite his small frame. Tyrell Ogloff trained with Bieber at his local gym when the singer visited his home town of Stratford, Ontario, in Canada, and told The Sun, "Justin was definitely on a mission to pump up. "He's pretty small but can pump a lot. "He benched 120 pounds for his chest and did about 400 crunches and sit-ups to build his core. He's in really good shape."

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