David Bowie's "Let's Dance" is about more than just dancing. It's about dishonesty, particularly when we mask our true feelings.
Lady Gaga is a big fan of horror movies; listen for the names of these three Alfred Hitchcock films in the lyrics to "Bad Romance": Psycho, Vertigo, Rear Window.
The Ricky Martin song "She Bangs" found new life when William Hung performed it so horribly on a 2004 episode of American Idol that it went viral.
Kylie Minogue's "Can't Get You Out Of My Head" received more airplay during the 2000s than any other song in the UK.
Adele isn't a ghost when she sings, "Hello from the other side" - it means the "other side of becoming an adult."
"Sloop John B" is a traditional West Indian folk song, and it was a huge hit for The Beach Boys in 1966. They tweaked the lyric, "This is the worst trip since I've been born" to "...I've ever been on" as a wink to acid culture.
In 1986, a Stephen King novella was made into a movie, with a classic song serving as title, soundtrack and tone.
Guitarist Tony Iommi on the "Iron Man" riff, the definitive Black Sabbath song, and how Ozzy and Dio compared as songwriters.
Some songs get a second life when they find a new audience through a movie, commercial, TV show, or even the Internet.
The former Metallica bassist talks about his first time writing a song with James Hetfield, and how a hand-me-down iPad has changed his songwriting.
