2. "Sweet Child O' Mine"
There aren't a lot of Guns N' Roses songs that can be effortlessly covered by everyone from Carrie Underwood to Sheryl Crow to the Black Eyed Peas. Perhaps their most accessible tune, "Sweet Child O' Mine" was born out of a spontaneous jam the members of the band undertook very late in the sessions for Appetite for Destruction. Axl wrote lyrics about his girlfriend Erin Everly, even if he never quite finished them. The line, "Where do we go now?" was originally an honest question. He didn't know where to take the song at that point, but it seemed to fit and so it stayed in. It became their only Number One hit in America.