David Jon Gilmour is an English musician, singer, songwriter and multi-instrumentalist. In a career spanning more than 50 years, he is best known for his work as the guitarist and co-lead vocalist of the progressive rock band Pink Floyd. It was estimated that by 2012 the group had sold over 250 million records worldwide, including 75 million units sold in the United States. In 2011, Rolling Stone magazine ranked him number 14 in their list of the Greatest Guitarists of All Time. Additionally, Gilmour was voted number 36 in the greatest voices in rock by Planet Rock listeners in 2009.