Before launching his career as a singer, Bruno Mars was a writer/producer. He and his co-writers pitched "Just The Way You Are" to Cee-Lo Green; when he turned it down, Bruno recorded it himself and released it in 2010 as his first single as a lead artist.
The horn flourish at the beginning of "Jump Around" comes from Bob and Earl's "Harlem Shuffle"; the squeal throughout the song might be a Prince sample.
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.
Sir Mix-A-Lot is credited as a writer on The Pussycat Dolls' biggest hit, "Don't Cha," because it interpolates his 1988 song "Swass," where he goes, "Don't you wish your boyfriend was swass like me?"
Bob Seger's song "Beautiful Loser" was inspired by book Leonard Cohen published in 1966 called Beautiful Losers.
The Steve Miller song "Abracadabra" was inspired by Diana Ross and The Supremes. Miller first met the girl group when they performed together on NBC's Hullabaloo in 1966, and he wrote the lyrics after spotting Diana Ross skiing years later.
Do you know who wrote Patti Smith's biggest hit? How about the Grease theme song? See if you can match the song to the writer.
Was Long Tall Sally a cross-dresser? Did he really set his piano on fire? See if you know the real stories about one of rock's greatest innovators.
When Judd Apatow needed under-appreciated rockers for his Knocked Up sequel, he immediately thought of Parker, who just happened to be getting his band The Rumour back together.
Taylor talks about "The Machine" - the hits, the videos and Clive Davis.
The Red Hot Chili Peppers have some rather unusual song titles - see if you can spot the real ones.
The Canadian superstar talks about his sudden rise to fame, and tells the stories behind his hits "Sunglasses At Night," "Boy In The Box" and "Never Surrender."