Channing Tatum says he is worried Justin Bieber found fame too young and could go off the rails.The 'White House Down' actor thinks the 'Baby' hitmaker - who was discovered at the age of 14 - found fame too young and hopes he doesn't go off the rails like many child stars do.He told Vanity Fair: "I do believe that whatever age you become famous, you end up staying that age."I worry about Bieber, man. That kid's wildly talented. I hope he doesn't fall down into the usual ways of young kids because it's so hard for someone to be responsible when they're not asked to be."Channing, 33, who recently welcomed his first child with wife Jenna Dewan-Tatum, admitted all celebrities are in danger of losing touch with reality.He explained: "We're not asked to do things ourselves. You have someone there with a coffee. 'You want food? I'll get you food.'"I put my bag in my trunk yesterday, I can't drive here, so my driver, great guy, Terry, amazing, I call him T-Bone, I drop my bag in and left the trunk open. And I get around to my door, and I'm like, 'What the f**k am I doing? That's not my behaviour.'"