Britney and Justin to host charity benefit

Britney Spears and Justin Timberlake are to co-host a charity benefit in New York.

Guests at Planet Hollywood will be able to bid for auction items to raise money for Britney and Justin's two charities.

Lots on February 3 range from a dance class with Timberlake or a cameo in an upcoming Britney movie, video or commercial.

The Britney Spears Foundation helps children in need, and the Justin Timberlake Foundation promotes music education for children.