As Johnny Cash's slyly funny liner notes explain, this legendary trio's impromptu show in Stuttgart, Germany, last April is a first-take, unrehearsed affair — the three all just happened to be playing at a European music festival. Each man sings at least one signature tune (e.g., Perkins' "Blue Suede Shoes") and they team up on several ready-at-hand chestnuts from country music's public domain of warmhearted cornpone ("That Silver-Haired Daddy of Mine") and old-time religion ("I Saw the Light").

The results are mixed. Cash, as always, sounds like a comfortable, potent icon. Stuttgart was his date, and he runs the show, cooing to his cronies and speaking to the crowd in knock-kneed German. Perkins huffs through his vocal turns, shaky though somehow compelling. But it's when Cash brings on "das best" — Jerry Lee Lewis — that things really heat up. Lewis' pumping piano invigorates the band and — just as when he vied to dominate Sun Records' Million Dollar Quarter with Perkins, Cash and Elvis Presley twenty-six years ago — his self-involved hollering makes for some real excitement.

“Help Me”

Joni Mitchell wrote and recorded this song for her album Court and Spark, but she had to switch from her regular band to make the song sound exactly the way she wanted. "I had attempted to play my music with rock & roll players," she told Rolling Stone. "They’d laugh, 'Awww, isn't that cute? She's trying to teach us how to play.'" Mitchell switched to a jazz band, Tom Scott’s L.A. Express, and scored the biggest hit of her career in the process.