Justin Timberlake has been urged to keep his relationship with Jessica Biel ''happy and fun''.

The singer's former N*Sync bandmate Joey Fatone - who has been married to Kelly Baldwin since 2004 - admits life can be ''tough'' for celebrity couples and believes Justin should make every effort to make things easy for them both.

Asked for his advice, he told Parade.com: ''Don't listen to all the BS. Especially in his situation, he and his fiancé - I haven't really talked to him about everything yet - but they're both in the limelight as well. It's tough for those celebrity couples. It's really hard.

''My wife wasn't in the limelight, which made it easier. The key is to keep it happy, light, and fun. There can be a lot of drama, like when you have kids. And both of them have jobs where they are taken to different places. It's the communication that really needs to drive that relationship.''

Despite N*Sync - which also featured Chris Kirkpatrick, Jc Chasez and Lance Bass - being on a hiatus since 2002, he reveals they are all still close friends.

He said: ''We saw each other for Chris Kirkpatrick's 40th. I'm 35. We're getting old! I had dinner with Chris recently and I talked to Justin, Lance Bass and JC Chasez during my birthday. We try to hook up together once in awhile.''