Avril Lavigne is letting one lucky fan dance on stage with her at an upcoming concert to raise money for charity.

The Complicated hitmaker is auctioning off a gift package, which includes tickets to one of her gigs in either London or Paris, France, later this month (Sep11), a backstage meet-and-greet - and the chance for one lucky devotee to rock out with Lavigne during the show.

All the proceeds from the auction will go towards the singer's Avril Lavigne Foundation R.O.C.K.S. - Respect, Opportunity, Choices, Knowledge, and Strength - which supports children living with serious illnesses and disabilities.

Lavigne launched the foundation last year (10).