
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.

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.
"End Of The Road" by Boyz II Men comes off a bit thirsty, especially when we find out the girl cheated on him. The sketch show In Living Color parodied the song, with the group as "Boyz II Wimps."

"Nobody Does It Better" by Carly Simon was used in the film The Spy Who Loved Me. It was the first James Bond song not named after the movie.

Many assumed Train's breakthrough hit, "Drops Of Jupiter (Tell Me)," is about a woman who leaves a relationship to find herself. Lead singer Pat Monahan actually wrote it after having a dream about his mother, who was "back in the atmosphere" after dying of cancer.

Kenny Loggins co-wrote the Doobie Brothers hit "What a Fool Believes," which is about a guy who just can't accept that an affair from long ago was meaningless to her.
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."
The Winger frontman reveals the Led Zeppelin song he cribbed for "Seventeen," and explains how his passion for orchestra music informs his songwriting.
The revered singer-songwriter talks inspiration and explains why she put a mahout in "Drop the Pilot."
Todd Rundgren explains why he avoids "Hello It's Me," and what it was like producing Meat Loaf's Bat Out of Hell album.
Where words like "email," "thirsty," "Twitter" and "gangsta" first showed up in songs, and which songs popularized them.