'Team Marcel Jacobs', a Dutch organisation raising money for more research into brain tumors, is auctioning an electric guitar that has been signed by many artists that performed at the Bospop festival in The Netherlands. To obtain this unique item, which has been signed by Roxette, Ringo Starr, Ron Wood, Joe Cocker, Rodger Hodgson and many more, you can place a bid by sending an email to the organisation. For more information, see the organisation's auction page (Dutch and English).