"Kashmir" is the only Led Zeppelin song to use outside musicians, as it needed strings and horns.
Sly & the Family Stone's "Thank You (Falettinme Be Mice Elf Agin)" was a huge hit in 1970 and found new life when Janet Jackson sampled the bass riff on her 1989 hit "Rhythm Nation."
The death of John Lennon was an influence on the Stevie Nicks hit "Edge Of Seventeen." He's the one with the "words of a poet and voice from a choir."
KT Tunstall's "Suddenly I See" was inspired by Robert Mapplethorpe's photograph of Patti Smith on the cover of her album Horses.
The guys from Chic wrote "Le Freak" as a message to a doorman who wouldn't let them into a club. Originally, it was "F--- Off."
"A Hard Day's Night" was the title song to The Beatles' first movie, which was surprisingly good: it was nominated for two Oscars.
"How much does it cost? I'll buy it?" Another songwriter told Jonathan to change these lyrics. Good thing he ignored this advice.
Webb talks about his classic songs "By the Time I Get to Phoenix," "Wichita Lineman" and "MacArthur Park."
The Celtic music maker Loreena McKennitt on finding musical inspiration, the "New Age" label, and working on the movie Tinker Bell.
An interview with Frankie Valli, who talks about why his songs - both solo and with The Four Seasons - have endured, and reflects on his time as Rusty Millio on The Sopranos.
"Mony Mony," "Crimson and Clover," "Draggin' The Line"... the hits kept coming for Tommy James, and in a plot line fit for a movie, his record company was controlled by the mafia.
With Bernie Taupin, Martin co-wrote the #1 hits "We Built This City" and "These Dreams." After writing the Pretty Woman song for Go West, he had his own hit with "In the House of Stone and Light."