Rascal Flatts is one of those bands whose most famous song is a cover. "Life Is A Highway," which they recorded for the movie Cars in 2006, was written and originally released by Tom Cochrane in 1991.

Jethro Tull lead singer Ian Anderson wrote "Aqualung" after looking at pictures of homeless men that his wife took. She got a co-writing credit on the song.

After Gwen Stefani and Gavin Rossdale coupled up in 1996, Rossdale's Bush bandmates referred to their hit song "Everything Zen" as "Everything Gwen."

Iggy Pop wrote "Lust For Life" with David Bowie, who came up with the music on a ukulele.

According to Jason Bonham, who has filled in for his father on Led Zeppelin reunions, "Rock And Roll" is the hardest Led Zep song to play on drums.

"Lean On" was originally sent by Major Lazer to both Rihanna and Nicki Minaj's camps as a slower reggae track. After both parties rejected the tune, Major Lazer recruited Danish singer MØ to supply vocals and they recorded it themselves.
She thinks of herself as a "song interpreter," but back in the '80s another country star convinced Emmylou to take a crack at songwriting.
Guitarist Tony Iommi on the "Iron Man" riff, the definitive Black Sabbath song, and how Ozzy and Dio compared as songwriters.
The Evanescence frontwoman on the songs that have shifted meaning and her foray into kids' music.
At 80 years old, Yoko has 10 #1 Dance hits. She discusses some of her songs and explains what inspired John Lennon's return to music in 1980.
Go beyond The Beatles to see what you know about the British Invasion.
Justin wrote the classic "Nights In White Satin," but his fondest musical memories are from a different decade.