At 10 AM today (Saturday), about 20 minutes from posting this, KOCE is broadcasting the "Highwaymen" concert from about 20 years again. The Highwaymen was the temporary group formed by Johnny Cash, Willie Nelson, Waylon Jennings and Kris Kristofferson. They aired it in Chicago the other week when I was back there, and it was absolutely wonderful.
This is almost a "best of" concert by these legends, and not only are the songs are performances terrific, but for many of these classic songs all four members join in and sing backup.
Though country music may not be everyone's taste, not only are these nonetheless classic songs that most people know, but many of them blended into pop hits -- like "Me and Bobby McGee, "On the Road Again," "Help Me Make It Through the Night," "A Boy Named Sue," and more.
Since this is clearing being broadcast at different times around the country, it's worth checking your local PBS schedules, as I said.