A photo of Robert Plant (LED ZEPPELIN) and Tony Iommi (BLACK SABBATH) taken after the two legendary rockers signed a Gibson SG Standard '61 guitar for Julien's Auctions' MusiCares Charity Relief Auction can be found below.Julien's Auctions recently announced the marquee lineup of items to be sold at MusiCares Charity Relief Auction, taking place Wednesday, September 9 live in Beverly Hills and online at juliensauctions.com with advance online bidding starting Monday, August 17.The items offered by artists, athletes and entertainers include those by Carlos Santana, Eric Clapton, Joan Jett, Tony Iommi, Robert Plant, Ozzy Osbourne and more in a charity...