Will.I.am, literally dreamt up "I Gotta Feelin'." Said the Black Eyed Pea: "Have you ever had a dream where there's a melody in your dream? I'll wake up out of my sleep and record that! 'I Gotta Feelin' was one of those songs."
Grazing In The Grass by The Friends Of Distinction was the first big hit to use the phrase "dig it" in the lyric.
"Grenade" was a term used on the show Jersey Shore to mean an ugly girl. Bruno Mars says his hit song with that title was written before the show started.
One of the last hits with a track made up almost entirely of uncleared samples is "Groove Is In The Heart" by Deee-Lite in 1990. Soon after, courts ruled that samples needed to be cleared.
"I Guess That's Why They Call It The Blues" by Elton John was written for the sister of actress Rene Russo. Bernie Taupin, who wrote the lyrics, was married to Rene's sister, Toni.
The names Louise, Jack, Marie and Milo all show up in the song "Footloose." Marie was the mother of Dean Pitchford, who co-wrote it.
Guitarist Tony Iommi on the "Iron Man" riff, the definitive Black Sabbath song, and how Ozzy and Dio compared as songwriters.
After cutting his teeth on hardcore punk videos, Paul defined the grunge look with his work on "Hunger Strike" and "Man in the Box."
The lead singer/lyricist of The Beach Boys talks about coming up with the words for "Good Vibrations," "Fun, Fun, Fun," "Kokomo" and other classic songs.
Can you be married in one country but not another? Only if you're part of a gay couple. One of the first famous singers to come out as a lesbian, Janis wrote a song about it.
Pool balls, magpies and thorns without roses - how well do you know your Tom Waits lyrics?
The Red Hot Chili Peppers have some rather unusual song titles - see if you can spot the real ones.