I have to admit, in the very beginning, the way in which rock was presented to me was through a specific song and not so much a band/artist. The earliest memory I have of listening to music of any kind that wasn't my Sesame Street or Raffi ("Baby Beluga" or "Down by the Bay", anyone?) albums was when I figured out how to get into my dad's cabinet where he kept his record and tape players. It was well established that I was never to touch his record player, but the tape deck didn't have a similar policy in effect, and it was much easier for me (at age... 5? 6?) to operate anyhow. The one tape I would choose over and over again to put in and then only listen to the first song, was a mix tape my dad had made of some of his favorite songs at the time (mid-80s). The song that introduced me to rock, and, really, all music outside of children's music, was this one... (talk about a big first step into "real" music :P).

http://www.youtube.com/watch?v=k4VFFBCa5Aw


And, here is the link for the GuitarTricks lesson for it:
http://www.guitartricks.com/lesson.php?input=18167&s_id=1396