9. Sonny and Cher, "I Got You Babe"
Less than a year after Bob Dylan released his caustic "It Ain't Me Babe," Sonny Bono decided to write what's essentially a response song. He'd recently fallen madly in love with Cher and Dylan's words just didn't speak to him. The song was an enormous smash, hitting Number One in the summer of 1965. It kicked off a long run of hits that eventually lead to a variety series, though they divorced in 1975. Still, the song had an extremely long afterlife. They sang it on Late Night With David Letterman on a famous 1987 episode and in the 1993 classic Groundhog Day, Phil Connors wakes up every single morning to the song. On Cher's ongoing tour, she sings the song as a virtual duet with Sonny Bono.