Copyright 2011 Rebecca Taylor/ MSG Photos
"Baby" Singer Justin Bieber works out backstage with trainer Dolvett Quince as he continues his My World tour. From medicine balls to the ab wheel, pull ups to sit-ups, and the dreaded bench dip, Justin shows USMagazine.com he does what it takes to keep his young body in shape. Not only is the 17-year-old a healthy eater, but despite his hectic schedule, he loves hitting the gym and plays golf and basketball with buds when time allows.
Hottest Spot: Abs
Rihanna once tweeted that Justin has six-pack abs. Since we rarely see any other part of his physique, we'll have to take her word for it.