Green Day has announced the bonus tracks that will accompany the digital version of 21st Century Breakdown due out May 15, 2009 via iTunes.

The band will include covers of The Who's "A Quick One While He's Away," Social Distortion's "Another State of Mind," Elvis' "That's Alright Mama" and Bob Dylan's "Like a Rolling Stone."

The band is also planning a deluxe release packaged with with 10-inch vinyl of the entire album, a 60 page book with exclusive art, and more. You can find more details on that here.