It was the unthinkable. Roger Waters, the creative force behind Pink Floyd's 'The Wall,' was left out of the band's mid-80s reunion. The group initially split in 1983, but David Gilmour and Nick Mason got the itch to reunite two years later. They added exiled keyboardist Richard Wright, which left one stumbling block.

Waters was intent on pursuing his solo career and wasn't happy that his bandmates were attempting to continue with or without him. He took them to court in 1985 over the usage of the band name and past material. Eventually the suit was settled out of court. The relationship remained damaged until 2005 when the members reunited onstage at Live 8, but things are still a little prickly. Waters has spent the last few years taking 'The Wall,' in its entirety, to the concert stage.