The Associated Press
Much of the rock 'n' roll and pop canon is well established.
Buying the albums of '60s and '70s acts like the Beatles, the Beach Boys, Led Zeppelin, Jimi Hendrix and Bob Marley is akin to a rite of passage for any young music fan. These are the artists that baby boomers love to keep buying, and with whom seemingly every teenager at some point experiments. (Remember A.J. hearing Bob Dylan for the first time in the "Sopranos" finale?)