Any Beatles fan (and with all the hype, even non-believers) knows that Saturday was the 40th anniversary of the release of the Sgt. Pepper's Lonely Hearts Club Band album. It was the album that changed everything. Along with lyrics that stuck in your head, the music incorporated novel instruments, strange background sounds, and it had a storyline. The opening track introduces Sgt. Pepper's lead singer: Billy Shears. And many fans will still insist that you listen to the full album all the way through, not on shuffle. It's one of those albums that turn into a defining symbol of a generation, and influences the next generation of artists who grew up listening to it. Aimee Mann is just one example. Her op-ed in Sunday's New York Times is a love letter to Sgt. Pepper's, and she explains why she can't bear to listen to it anymore. Beatles fan? Why was Sgt. Pepper's so special, and does it still have the same magic it did in 1967?

1:44 - June 4, 2007