Today in 1980, the world lost a true music icon much of whose work is as relevant today as it ever was. While it's pretty futile to try and touch on John Lennon's influence on modern music in its entirety, "Imagine" stands as a classic that sounds just as good today as it ever has. So take a few minutes to give it a listen and imagine a world where great artists don't get murdered before their time. It's easy if you try. [Spotify, Amazon, iTunes]