Ella Langley's country crossover hit "Choosin' Texas" was co-written by Texas native Miranda Lambert, who told Ella a story about getting pulled over with a kangaroo in her car (yes, a real kangaroo - a baby). "She's from Texas, I can tell," Langley said, which sparked the song.
Before she was famous on Friends, Courteney Cox danced on stage with Bruce Springsteen in his "Dancing In The Dark" video.
"Constant Craving" by k.d. lang deals with principles of Buddhism, including the cycles of birth and death.
"Mercedes Boy" by Pebbles is about a real guy she fell in love with - they both drove Mercedes when she wrote it.
Songwriter Wayne Carson came up with the Willie Nelson classic "Always On My Mind" while on the phone to his wife when he was apologizing to her for being stuck at the office.
Katherine Heigl played Josh Kelley's love interest in the video for his 2005 song "Only You." They met on the shoot, became a real-life couple, and got married two years later. That's good casting!
Scott was Stevie Wonder's bass player before becoming a top session player. Hits he played on include "I Will Survive," "Being With You" and "Sara Smile."
Soul music legend Bill Withers on how life experience and the company you keep leads to classic songs like "Lean On Me."
Tom talks about the evolution of Cinderella's songs through their first three albums, and how he writes as a solo artist.
Before he was the champ, Ali released an album called I Am The Greatest!, but his musical influence is best heard in the songs he inspired.
The in-depth discussion about the making of Jesus Christ Superstar with Ted Neeley, who played Jesus in the 1973 film.
For songwriters, Johnny represents the American man. He has been angry, cool, magic, a rebel and, of course, marching home.