"Think About You" by Guns N' Roses 
In my high school years, I listened to everything from The Clash, Violent Femmes, and The Cure to Prince, Public Enemy, and Cowboy Junkies. I had pretty eclectic taste, but even I wasn't immune to the Guns N' Roses craze that swept the nation. This is one of my favorite rock songs from the late '80s, very recently rediscovered (hence why it's on my 2007 list). Still sounds pretty good 20 years later.
Live performance of the song at the Music Machine in LA, 1986:
