USHER has advised Justin Bieber not to date a fan.

The 'OMG' hitmaker is a mentor to the 16-year-old singer and has advised his protegee to enjoy his success but to learn from his own mistakes and keep a distance from his supporters.

He said: "I tell Justin you've got to love all your fans without falling in love with them. I can't say I've never dated a fan but it's not a good idea. I tell him to understand that you are a fantasy to them and you should be mindful of that.

"And I encourage him to not take success so seriously so early. Have fun with it. And make friends!"

Usher - who has sons Usher V, two, and Naviyd, 23 months, with ex-wife Tameka Foster - is thankful for his own success and would never complain about his life because he knows how lucky he is.

He added: "I'm so happy. I can't complain. And if I did, people would have a fit.

"How could I complain when I get to do what I do, travel, be with my kids and have a grand life?"