David Gilmour, along with Roger Waters, was the lead vocalist, and guitarist, for the progressive rock group Pink Floyd. Gilmour joined Pink Floyd in 1968, when he was asked to replace former frontman and guitarist Syd Barrett. Barrett was becoming increasingly difficult to work with (partly due to substance abuse), so Gilmour stepped in to fill the void. Gilmour's contributions helped to define what would become known as the "Pink Floyd" sound. With Roger Waters, Gilmour co-wrote many of Pink Floyd's classic songs, including "Shine On You Crazy Diamond", "Wish You Were Here", "Time", "Dogs", "Echoes", "Comfortably Numb", and "Run Like Hell".
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