Katy Perry's breakout hit "I Kissed A Girl" was surprising to those familiar with her past: her parents were pastors and she started off singing Christian music.
Drake's "One Dance" was the first ever song to rack up one billion streams on Spotify.
The song "Without You," a hit for Nilsson in 1972 and Mariah Carey in 1994, was written and originally recorded by Badfinger in 1970.
Elvis Presley recorded "Always On My Mind" in 1972, but Willie Nelson's version 10 years later was the hit and won the Song of the Year Grammy.
Bruce Springsteen wrote "Blinded By The Light," which was a #1 hit for Manfred Mann's Earth Band. The "Madman Drummers" line is a reference to Springsteen's first E-Street drummer, Vinnie "Mad dog" Lopez.
The Scorpions and UFO guitarist is also a very prolific songwriter - he explains how he writes with his various groups, and why he was so keen to get out of Germany and into England.
When you have a song called "Fire," it's tempting to set one - these guys did.
One of the most popular classical vocalists in the land is lining up a trip to space, which is the inspiration for many of her songs.
Country songs with titles so bizarre they can't possibly be real... or can they?
It started with a bouncy MTV classic. Nirvana and MCR made them scary, then Gwen, Avril and Madonna put on the pom poms.
Bridesmaids, Reservoir Dogs, Willy Wonka - just a few of the flicks where characters discuss specific songs, sometimes as a prelude to murder.
