It’s a special thing when artists who’ve achieved greatness in their own right join forces to create a new musical entity. We’ve been blessed with a number of these “supergroups”: Blind Faith, Crosby, Stills, Nash & Young, Velvet Revolver and Golden Smog, to name just a few. When a supergroup clicks, it can be magical. But when they don’t work…look out. The Million Dollar Quintet It’s a little-known fact that the Million Dollar Quartet —Elvis Presley, Johnny Cash, Jerry Lee Lewis and Carl Perkins— was originally a quintet. The fifth member of this historic December 4, 1956, Sun Studios jam...