Six of the best songs from American rock trio Green Day, arranged for guitar. 6 Of The BestA" simply does what it says - six of the best hits from leading artists available in a new and competitively priced format. Green Day has sold over 22 million records in the United States. They have won four Grammy Awards; Best Alternative Album for Dookie, Best Rock Album for American Idiot, Record of the Year for Boulevard of Broken Dreams, and Best Rock Album for the second time for 21st Century Breakdown.