If anyone here is a fan of Fleetwood Mac *and* the Beach Boys, check out the 1-hour documentary "Dennis Wilson, the Real Beach Boy." Contains rare photographs of Christine and Dennis during their romance, including the famous heart-shaped garden that Dennis had made for her birthday.
They met when Fleetwood Mac was seriously considering buying Brother Studios, the Wilsons' personal studio, circa 1978 if I understand correctly. The BBC documentary (narrated by Graham Nash!) is available online for free. If you want to skip right to the Mac bits, it's around 40 minutes in.