7. Green Day - Dookie
San Francisco’s Bay Area might have been hip to the infectious three-chord pop-punk of Green Day years before their major label debut Dookie, but no one predicted them dominating the charts and becoming one of rock’s biggest bands. With five successful singles and a snarling take on guitar pop, Dookie has gone on to sell over 20 million copies, 2 million more than Guns ‘N Roses’ Appetite For Destruction. More importantly, the album signified the emergence of pop-punk as a vital genre and one that sent major labels on the hunt for punk’s next big act.