Working on a covers album by one of your heroes prior to him unexpectedly dying may suddenly alter the course of your tribute, and for the Pains of Being Pure at Heart's Kip Berman, it changed him profoundly.
Tom Petty's An American Treasure is a total win. Its showcase of b-sides, leftovers, outtakes, and live performances keeps a tight focus on the fact that Petty left this world plenty of excellent material.
It's one of the strangest pop microcosms in history: singles released exclusively from Greatest Hits compilations. We rounded 'em up and ranked 'em to find out what is truly the greatest Greatest Hit of all.