As the face—and last surviving member—of the Mamas and the Papas, Michelle Phillips helped define the sound and spirit of the 1960s counterculture. Fiercely loyal to friends and family, she has spent decades preserving the band’s legacy while living by a personal code that balances the nonchalance of her hit song “California Dreamin’” with personal discipline: never late, never in rehab, never dependent. Still, at 80, she’s the first to admit her early days weren’t spotless. “I ended up in jail