Cee-Lo Green sang backup on the 1994 TLC hit "Waterfalls."
Elvis Presley recorded "Always On My Mind" in 1972, but Willie Nelson's version 10 years later was the hit and won the Song of the Year Grammy.
Neil Young rarely allows his songs to be sampled, but he let the Canadian group Redlight King use "Old Man" in their 2011 song, also called "Old Man."
Jeff Lynne sang the word "groose" in the chorus of "Don't Bring Me Down" as a nonsense placeholder, but left it in when he found out it means "greetings" in German ("gruss").
Nelly's "Country Grammar" is a celebration of his hometown of St. Louis, which some folks from the coasts consider "country" because it's in the Midwest.
"Hunger Strike" by Temple of the Dog features Chris Cornell and Eddie Vedder, and was Vedder's first music video.
Harry Wayne Casey tells the stories behind KC and The Sunshine Band hits like "Get Down Tonight," "That's The Way (I Like It)," and "Give It Up."
Did Al play on a Beach Boys record? Did he have beef with George Lucas and Coolio? See if you can spot weird but true stories.
Fishbone has always enjoyed much more acclaim than popularity - Angelo might know why.
She thinks of herself as a "song interpreter," but back in the '80s another country star convinced Emmylou to take a crack at songwriting.
Meshell Ndegeocello talks about recording "Wild Night" with John Mellencamp, and explains why she shied away from the spotlight.
Outrageously gifted and just plain outrageous, Millie is an R&B and Rap innovator.