Justin Timberlake originally wrote "Gone" for Michael Jackson, but his team turned it down, so 'N Sync cut it instead.
45% of the royalties for "Somebody That I Used To Know" go to the estate of the Brazilian classical guitarist Luiz Bonfá, whose song "Seville" Gotye sampled.
"All I Wanna Do" by Sheryl Crow started with the first line from an obscure poem called "Fun" that read, "All I wanna do is have some fun."
"Mrs Robinson" was originally called "Mrs Roosevelt," most likely after First Lady Eleanor Roosevelt. It became "Mrs Robinson" when it was considered for use in the film The Graduate.
"Cotton Eye Joe" is a folk song dating to the 1800s, but it became a hit when a Swedish act called Rednex did a psychokinetic version in 1994.
Miguel wrote "Adorn" about his girlfriend, model and artist Nazanin Mandi when he was returning home from a long trip and was anxious to see her.
In this quiz, spot the artist who put Romeo into a song lyric.
The guy who brought us "Stacy's Mom" also wrote the Jane Lynch Emmy song and Stephen Colbert's Christmas songs.
Wilder's hit "Break My Stride" had an unlikely inspiration: a famous record mogul who rejected it.
Yngwie Malmsteen and Steve Vai were two of Graham's co-writers for some '80s rock classics.
The Def Leppard frontman talks about their "lamentable" hit he never thought of as a single, and why he's juiced by his Mott The Hoople cover band.
