Actor Channing Tatum fears teen singer Justin Bieber will struggle with the responsibilities of adulthood because he has so little experience of the real world after growing up in the spotlight. The pop star has attracted a slew of negative criticism for his bad boy behaviour in recent weeks, and most recently came under fire for allegedly racing his Ferrari sports car around his California gated community at high speeds. Bieber's antics have sparked concerns he is spiralling out of control, and new father Tatum worries the Baby singer's early success could actually cripple him in later life. Tatum tells Vanity Fair magazine, "I don't remember who said it, but I do believe that whatever age you become famous, you end up staying that age. Because from that point you're not asked to be a normal citizen. I broke through at 24 or 25. I had lived a pretty diverse life. When I was finally making money, I knew exactly what I needed... $5.67. I'd have one meal a day. I would go to Checkers (fast food joint) and get the No. 1 (meal) with everything... "I worry about Bieber, man. That kid's wildly talented. I hope he doesn't fall down into the usual ways of (famous) young kids because it's so hard for someone to be responsible when they're not asked to be. We're not asked to do things ourselves. You have someone there with a coffee. (They say,) 'You want food? I'll get you food.'" Tatum became a first-time father last week (31May13) when his wife Jenna Dewan-Tatum gave birth to a little girl, Everly.