Paul McCartney wrote "Hey Jude" to comfort John Lennon's 5-year-old son Julian, whose parents were getting a divorce.
The most famous pop song featuring a bassoon: "The Tears of a Clown" by Smokey Robinson & the Miracles.
The first single to simultaneously top the UK and US charts was The Everly Brothers' "Cathy's Clown" in May 1960.
Zach Bryan and Kacey Musgraves had both gone through divorces when they wrote and recorded the wrenching duet "I Remember Everything." It was the first #1 Hot 100 hit for each of them.
Paper Mate paid for Autograph's "Turn Up The Radio" video in exchange for prominent placement of their erasable pen.
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.
Did Rivers Cuomo grow up on a commune? Why did they name their albums after colors? See how well you know your Weezer in this Fact or Fiction.
Franti tells the story behind his hit "Say Hey (I Love You)" and explains why yoga is an integral part of his lifestyle and his Soulshine tour.
How well do you know your protest songs (including the one that went to #1)?
Collaborating with T Bone Burnett, Leslie Phillips changed her name and left her Christian label behind - Robert Plant, who recorded one of her songs on Raising Sand, is a fan.
Bowie's "activist" days of 1964 led to Ziggy Stardust.
Roger tells the stories behind some of his biggest hits, including "Give a Little Bit," "Take the Long Way Home" and "The Logical Song."