A sultry singer and a scrappy hip-hop duo. Lana Del Rey and Macklemore are just a few of the artists who got their big break in 2012.

A musician gets arrested on stage for the first time. Which Beatle becomes a Walrus? And it's the Summer of Love while the nation marches against the Vietnam War.

In 2000, Napster took the world by storm by offering millions of songs all for free. Metallica was the first to fight back. We look at how streaming evolved.