Britney Spears has formed an unlikely alliance with one of LA's most successful paparazzi agencies, X17, to auction off a signed copy of her new album, Blackout, on eBay to raise money for Unicef. Bidding on the signed cd started yesterday at $25 and quickly reached $7200. The troubled pop princess, who is fighting a custody battle over her two young sons, said, "I think it's important to give back and, with the release of Blackout, this seemed the perfect opportunity to give the fans a chance to bid on something to help children everywhere."