"What A Wonderful World," released in 1967 four years before Louis Armstrong died, didn't find an audience in America until 1988 when it was used in the movie Good Morning, Vietnam.
Diane Warren originally wrote Aerosmith's hit tune "I Don't Want To Miss A Thing" for Celine Dion.
Fall Out Boy's "The Kids Aren't Alright" song title is not a reference to The Offspring's 1998 single of the same name. It actually alludes to The Who's 1979 rockumentary film called The Kids Are Alright.
"Can't Help Falling In Love" wasn't a #1 hit for Elvis in America, but it's his most popular song in the streaming era, thanks to use in short-form videos and placements in movies and TV shows. One famous use is in the movie Crazy Rich Asians, where it plays in a wedding scene.
Pitbull is the lead artist on his Kesha collaboration "Timber," a #1 hit in 2014, but he only raps for about a minute on the song - Kesha does most of the work.
Eminem sampled Dido's "Thank You" for his song "Stan," and Dido appeared in his video as Stan's unfortunate wife.
Kelly Keagy of Night Ranger tells the "Sister Christian" story and explains why he started sweating when he saw it in Boogie Nights.
Bowie's "activist" days of 1964 led to Ziggy Stardust.
His keyboard work helped define the Muscle Shoals sound and make him an integral part of many Neil Young recordings. Spooner is also an accomplished songwriter, whose hits include "I'm Your Puppet" and "Cry Like A Baby."
Lita talks about how they wrote songs in The Runaways, and how she feels about her biggest hit being written by somebody else.
Rufus Wainwright on "Hallelujah," his album Unfollow The Rules, and getting into his "lyric trance" on 12-hour walks.
The "A Thousand Miles" singer on what she thinks of her song being used in White Chicks and how she captured a song from a dream.