The 30-year-old Cry Me A River singer has been focused on his film career in recent years, appearing in The Social Network, Friends With Benefits and the forthcoming Bad Teacher with ex-girlfriend Cameron Diaz.
And he said that while he can't see himself writing anymore music, he can imagine taking to the road one last time.
He told Vanity Fair, 'I wouldn't say I'm not going to put out another [album]. I would say that would be a bad bet, if you were betting. But I could see myself only doing one more big tour.'
Talking about his decision to strip off in Friends With Benefits, he warned fans not to expect a repeat performance.
'It was fun, but I can't say I'm going to be butt-naked in a movie again.
'I only did it because I'm young now, and everything's where it's supposed to be. I figured this is the time, before gravity gets the best of me.'