The trail runs from flying saucer songs in the '50s, through Bowie, blink-182 and Katy Perry.
Does he have beef with Gaga? Is he Sean Lennon's godfather? See if you can tell fact from fiction in the Elton John edition.
Petula talks about her hits "Downtown" and "Don't Sleep In The Subway," and explains her Michael Jackson connection.
Dean's saga began with "Ariel," a song about falling in love with a Jewish girl from New Jersey.
Wilder's hit "Break My Stride" had an unlikely inspiration: a famous record mogul who rejected it.
The Third Day frontman talks about some of the classic songs he wrote with the band, and what changed for his solo country album.