They called it the Summer of Love. 1967 was an incredible year in rock music, as wild new psychedelic sounds reflected the freedom and experimentation of the counterculture movement. Later this year, we'll take a look back at the single most influential album of 1967, the Beatles' "Sgt. Pepper's Lonely Hearts Club Band." This week, as the Grammys approach, we're flashing back to recall the legacies of some of the other amazing bands and albums that filled the air 50 years ago, from the Doors and the Grateful Dead to the Rolling Stones and the Byrds.