The first time Jimmy Page, Robert Plant, John Bonham and John Paul Jones all recorded together in the studio was when they backed American singer PJ Proby on his 1969 album Three Week Hero.
"Celebration" by Kool & the Gang has a deeper meaning - it was inspired by a verse in the Quran where angels celebrate as God creates man.
The song "Without You," a hit for Nilsson in 1972 and Mariah Carey in 1994, was written and originally recorded by Badfinger in 1970.
Lily Allen wrote "Something's Not Right" for the soundtrack of the Peter Pan prequel, Pan. The song was inspired by the heartache that Allen experienced after suffering a miscarriage when she was six months pregnant with her first child by husband Sam Cooper in 2010.
"Ain't Nobody" by Rufus & Chaka Khan was one of the first big hits to use a sequencer, which is how that distinctive keyboard loop was created. The song almost landed on Michael Jackson's Thriller album, but the group decided to keep it.
"Rhiannon" is a Welch goddess. Stevie Nicks wrote the song, and it was a huge influence on her image, inspiring her flowing shawls and black outfits she began wearing on stage.
A talented lyricist, Philip helped revive Neil Sedaka's career with the words to "Laughter In The Rain" and "Bad Blood."
Songwriting Hall of Famer Linda Perry talks about her songs "What's Up" and "Beautiful," her songwriting process, and her move into film music.
Bradley Cooper, Michael J. Fox, Rami Malek, Reese Witherspoon, Gwyneth Paltrow and George Clooney: Which actors really sang in their movies?
Surprise exits, a catfight and some very memorable performances make our list of the most memorable Idol moments.
Zac tells the story of Hanson's massive hit "MMMbop," and talks about how brotherly bonds effect their music.
The Sevendust frontman talks about the group's songwriting process, and how trips to the Murder Bar helped forge their latest album.