"Toxic" was the most-searched song on Google in 2004 and helped Spears become the most-searched artist that year, a title she held from 1999-2001.
"In The Air Tonight" by Phil Collins was revived when it was used in the first episode of Miami Vice, three years after it was released.
Katy Perry co-wrote Iggy Azalea's hit single "Black Widow." Perry was originally going to sing on the track, but she couldn't fit it into her schedule, so Rita Ora provided the sung vocals instead.
George Michael was 17 and on a bus to his job at the cinema when he came up with the idea for "Careless Whisper" and the lyrics, "Something in your eyes calls to mind a silver screen."
In the Belly song "Feed The Tree," the title is a reference to bodies buried under a large tree, thus feeding it. The song is about death, and also respect - take your hat off for those feeding the tree!
When he joined Guns N' Roses in 1990, Matt helped them craft an orchestral sound; his mezzo fortes and pianissimos are all over "November Rain."
Graham Nash tells the stories behind some of his famous songs and photos, and is asked about "yacht rock" for the first time.
The Creed lead singer reveals the "ego and self-fulfillment" he now sees in one of the band's biggest hits.
Sheryl Crow's longtime songwriting partner/guitarist Jeff Trott reveals the stories behind many of the singer's hits, and what its like to be a producer for Leighton Meester and Max Gomez.
We've heard of artists putting their hearts into their music, but some take it literally.
