On September 14, 2007, Prince announced that he was going to sue YouTube and eBay, because they hosted his copyrighted material, and he hired the international Internet policing company Web Sheriff. In October, Stephanie Lenz filed a lawsuit against Universal Music Publishing Group claiming that they were abusing copyright law after the music publisher had YouTube take down Lenz's home movie in which the Prince song "Let's Go Crazy" played faintly in the background. On November 5, several Prince fan sites formed "Prince Fans United" to fight back against legal requests which, they claim, Prince made to prevent all use of photographs, images, lyrics, album covers, and anything linked to his likeness. Prince's lawyers claimed that this constituted copyright infringement; the Prince Fans United said that the legal actions were "attempts to stifle all critical commentary about Prince". Prince's promoter AEG stated that the only offending items on the three fansites were live shots from Prince's 21 nights in London at the O2 Arena earlier in the year.