Justin Timberlake tries to "ignore film set catering"

Justin Timberlake tries to “ignore the catering” when he is working on a movie.

The singer and actor strives to keep in shape and has a disciplined exercise and diet regime. But Justin admits that spending long hours on movie sets can make it difficult to resist eating junk food in between takes.

“You have to ignore the catering. It seems like a pain, but it’s really not that hard to monitor your own calories once you get it down. Plus, sometimes I can up my intake because I’m working 12-hour days and burning a lot more energy,” he told GQ magazine. “All that diet and health stuff really revolves around the movie or show.”

Justin has appeared in movies including ‘The Social Network’, ‘In Time’ and ‘Bad Teacher’. Filming can take months, and he tries not to lose or gain too much weight.

“Sometimes I wake up and stretch and do 20 minutes on the treadmill, or anything to just break a sweat,” he said.

“And then I have the weekends where I can get out and play nine holes and maybe go to the gym. So I try and moderate it. It’s kind of like running a marathon.”