Justin Timberlake Put in Work at the Gym to Gain 15 Lbs. for His New Movie: ‘He’s a Beast’

https://www.instagram.com/p/CKmSsmjBdSr/https://www.instagram.com/p/CKmSsmjBdSr/https://www.instagram.com/p/CKmSsmjBdSr/ Justin Timberlake is in "beast" mode at the gym! The musician and actor, 39, increased the intensity of his workouts last year to add muscle for his latest role as a former football player and ex-con in the new Apple+ movie Palmer. Timberlake's goal was to add 15 lbs….