Harmonix has announced that the entirety of John Lennon's album Imagine will be available as DLC, shortly after the game's release. Lennon joins fellow rock and roll legends Jimi Hendrix, The Doors, Billy Joel, and (the slightly less legendary) Bon Jovi as musicians who are providing post-release songs for Rock Band 3.

"The songs on John Lennon's Imagine run the gamut from beautiful piano-driven ballads like 'Jealous Guy' to all-out guitar rockers like 'Gimme Some Truth'," said Paul DeGooyer, senior vice president of electronic games, music and programming for MTV Networks. "It's an incredible musical statement, and a real workout on keyboard, guitar and vocals in Rock Band 3. We're very excited to confirm it as one of the first downloads for our new game, and to help our fans celebrate John's 70th birthday with its release."

Rock Band 3 hits stores October 26 (that's tomorrow!). For more information about the game, check out our review.