4. "Unknown Legend"
Not long after Neil Young split up with actress Carrie Snodgress, he became enchanted with a waitress named Pegi at a diner near his ranch. They married in August of 1978, and 14 years later, he turned their love story in the leadoff track on Harvest Moon. "She used to work in a diner," he sang. "Never saw a woman look finer/I used to order just to watch her float across the floor." Fans worried their divorce might mean he'd never do the song again (sort of like Bob Dylan with "Sara"), but it's been a regular highlight of the 2015 tour with Promise of the Real.