AS A HIGH SCHOOL SENIOR IN 1966, Stevie Nicks’s social highlight was the weekly Young Life youth group meeting, held every Wednesday at a local church. It was there, shortly before graduation, that she noticed a tall boy with dark curls and intense blue eyes sitting moodily in the corner, playing the opening riff to “California Dreamin’,” which had just become a hit for the Mamas & the Papas. Nicks knew the song well—she often sang along to it in her bedroom. She was less acquainted with the boy, whom she recognized from the halls of Menlo-Atherton High. Though he was a year younger, she found him “absolutely stunning.” Doing her best to appear casual, she began singing in harmony, much to the surprise of this young man with the…