21. Coldplay, 'Parachutes'
(2000). Sold: 2.5 million. 'Parachutes' was Coldplay's very first album and according to trade paper Music Week, was one of the most impressive debut albums ever, spawning the hit singles 'Shiver', 'Yellow', and 'Trouble'. We gave it a 9/10 and said, "All told, it's incredible this is a debut album."