Mixtapes and MTVFor better or worse, the 1980s shifted the dial on expectations of what pop and rock music should be. The decade was more than just mullets and shoulder pads; it was also the heyday of synth pop, and the golden eras of both heavy metal and hip hop. The two biggest selling albums of all time hail from the 1980s: Michael Jackson's Thriller and AC DC's Back in Black. The Sony Walkman shifted listening from a shared to a solo experience, while vinyl