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.
Bruce Springsteen's "Streets Of Philadelphia" won the Oscar for Best Original Song in 1994, beating out Neil Young's "Philadelphia," which was also written for the movie Philadelphia.
"Slow Hand" was a #1 Country hit for Conway Twitty in 1982, a year after The Pointer Sisters recorded it.
Roger Daltrey stutters the vocal on "My Generation" by The Who. The idea was to sound like a British kid on speed.
Kacey Musgraves offered "Follow Your Arrow" to her friend Katy Perry, but Perry thought Musgraves should record the song herself, telling Kacey it seemed "like something that you would totally say."
The song "Sadeness" by Enigma (the one with the chanting monks), got its name from the French novelist Marquis de Sade, who believed sex had to be painful in order to be pleasurable - thus the word "sadism."
The "Lowdown" and "Lido Shuffle" singer makes a habit of playing with the best in the business.
Cain talks about the divine inspirations for "Don't Stop Believin'" and "Faithfully."
Katy Perry mentions McDonald's, Beyoncé calls out Red Lobster, and Supertramp shouts out Taco Bell - we found the 10 restaurants most often mentioned in songs.
Taylor talks about "The Machine" - the hits, the videos and Clive Davis.
Evelyn McDonnell, editor of the book Women Who Rock, on why the Supremes are just as important as Bob Dylan.
Bob was the bass player and lyricist for the first two Ozzy Osbourne albums. Here's how he wrote songs like "Crazy Train" and "Mr. Crowley" with Ozzy and Randy Rhoads.