"Girl Crush" by Little Big Town came from the hashtag #girlcrush, which its co-writer, Lori McKenna, spotted on Instagram.
Otis Redding often ad-libbed vocals at the end of songs, but for "(Sittin' On) The Dock Of The Bay" he just whistled instead - it became the most famous whistling in song history.
"Womanizer" was Britney Spears' comeback song, going to #1 about 10 months after she was institutionalized to get treatment for addictions and mental health issues.
Jimmy Webb was inspired to write "Up-Up and Away" by a balloon that his friend William F. Williams flew on promotions for radio station KMEN.
The New Year's Eve favorite "Auld Lang Syne" is a Scottish song that roughly translates to "Days Of Long Ago."
"Veronica" was inspired by Elvis Costello's grandmother, who suffered from Alzheimer's disease.
Shears does very little promotion, which has kept him secluded from the spotlight. What changed when Cyndi Lauper had a hit with his song? Not much, really.
"Mr. Jones" took on new meaning when the song about a misguided view of fame made Adam famous.
Taylor talks about "The Machine" - the hits, the videos and Clive Davis.
"25 or 6 to 4" to "Semi-Charmed Life" - see if you can spot the songs that are really about drugs.
The outlaw country icon talks about the spiritual element of his songwriting and his Bob Dylan mention.
Evelyn McDonnell, editor of the book Women Who Rock, on why the Supremes are just as important as Bob Dylan.