The Golden Era of cover art likely ended with the rise of CDs. But even with the Golden Age of CDs behind us, cover art still plays a vital role in the listener's consumption of music. Along with the album title, it serves as a sort of opening salvo or prelude that sets the tone for the music itself, and it is often the last image that remains in the listener's mind. It is the face of the music. With that in mind, here our picks for the best cover art of 2015.