
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.

Back To The Future wasn't the only movie where Michael J. Fox rocked out: He sang with Joan Jett in the 1987 movie Light Of Day, with a title track written by Bruce Springsteen.
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!

"Panama" by Van Halen is not about the country or the canal, but about a stripper David Lee Roth met in Arizona.

"Today" by Smashing Pumpkins is sarcastic in the line "today is the greatest day." Lead singer Billy Corgan wrote it about the crippling depression he was battling following the band's first big tour.

"Thinking About You" was the ninth track from Calvin Harris' 18 Months album to enter the UK singles Top 10. No other artist has obtained so many hits from one LP - Michael Jackson was the previous record holder with seven Top 10 tunes from both his Bad and Dangerous sets.
Gramm co-wrote this gorgeous ballad and delivered an inspired vocal, but the song was the beginning of the end of his time with Foreigner.
"How much does it cost? I'll buy it?" Another songwriter told Jonathan to change these lyrics. Good thing he ignored this advice.
He wrote "She Blinded Me With Science" so he could direct a video about a home for deranged scientists.
10 Questions for the author of Precious Metal: Decibel Presents the Stories Behind 25 Extreme Metal Masterpieces
Brenda talks about the inspiration that drove her to write hit songs like "Get Here" and "Piano in the Dark," and why a lack of formal music training can be a songwriter's best asset.
The longtime BS&T frontman tells the "Spinning Wheel" story, including the line he got from Joni Mitchell.