Green Day is number one on the American charts selling 267,000 copies of American Idiot just in America, and they are also number one in the following countries; Canada, Japan, Italy, Australia, and the UK (which sold over (200,000).
Green Day is the UK's Favorite band: Read more here

Since the site went down i've been trying to gather all the stuff i have. I have about 12345981374 articles about Green Day taking over number one on the Billboard, so I'll just give you the important ones, along with a few more reviews of American Idiot: