Jay-Z did the rap on Beyoncé's "Crazy In Love" at the last minute. They had just started dating; she asked him to feature on the track the night before she had to turn in her album.
Bruce Springsteen originally wrote "Hungry Heart" for The Ramones, but decided to keep it for himself on the advice of his producer and manager, Jon Landau.
Otis Redding often ad-libbed vocals at the end of songs, but for "(Sittin' On) The Dock Of The Bay" he just whistled instead - it became some of the most famous whistling in song history.
Recording "Don't Let The Sun Go Down On Me," Elton John was frustrated and sang the line "don't discard me" with an exaggerated American accent, which is why is sounds strange.
Ellie Goulding's hit song "Lights" is about her fear of the dark, which forces the singer to sleep with the lights on.
Whitesnake's "Here I Go Again" is a very inspiring song, but it's really about heartbreak: David Coverdale wrote it when his first marriage was falling apart.
The drummer for Anthrax is also a key songwriter. He explains how the group puts their songs together and tells the stories behind some of their classics.
dUg dIgs into his King's X metal classics and his many side projects, including the one with Jeff Ament of Pearl Jam.
Tyler talks about his true love: songwriting. How he identifies the beauty in a melody and turns sorrow into art.
Rob Halford dives into some of his Judas Priest lyrics, talking about his most personal songs and the message behind "You've Got Another Thing Comin'."
As Procol Harum's lyricist, Keith wrote the words to "A Whiter Shade Of Pale." We delve into that song and find out how you can form a band when you don't sing or play an instrument.
An interview with Dr. John Covach, music professor at the University of Rochester whose free online courses have become wildly popular.