It was the best of times and it was the worst of times. Actually, take that back: the year 1970 alone was the best of times, musically: the Beatles, Simon & Gafunkel, Stevie Wonder, Sly & The Family Stone, BB King. But the rest of the decade, well, let’s just say we endured: “Kung Fu Fighting,” “Tie A Yellow Ribbon ‘Round the Old Oak Tree,” and – I’m very sorry about this – Debbie Boone’s “You Light Up My Life.” Still, amid the darkness some bright lights shined, like Elton John, David Bowie, Fleetwood Mac, and Queen.