Katy Perry says her 2008 song "Ur So Gay" is about "guys who wear the guyliner, steal your jeans, and that whole almost hipster emo scene."
"Big Love" is a showcase song for Lindsey Buckingham and the first single from Fleetwood Mac's 1987 album Tango In The Night, but he left the group soon after the album was released and the band didn't perform it live until he returned 10 years later.
The fadeout on Drake's "Hotline Bling" lasts 55 seconds - one of the longest outros of any hip-hop hit.
"Stand By Me" was a hit for Ben E. King when it was released in 1961, and again in 1986 after it was used in the movie of the same name.
The motto for Boys Town, which was a Nebraska home for troubled youth, inspired the song "He Ain't Heavy, He's My Brother" by The Hollies.
Michael Stipe hadn't finished the lyrics when R.E.M. recorded "Radio Free Europe." He calls the vocal "complete babbling."
The Scorpions and UFO guitarist is also a very prolific songwriter - he explains how he writes with his various groups, and why he was so keen to get out of Germany and into England.
A big list of musical marriages and family relations ranging from the simple to the truly dysfunctional.
Some songs get a second life when they find a new audience through a movie, commercial, TV show, or even the Internet.
Emilio talks about what it's like to write and perform with the Tower of Power horns, and why every struggling band should have a friend like Huey Lewis.
How a country weeper and a blues number made "rolling stone" the most popular phrase in rock.
Songwriters have used cards and card games to make sense of heartache, togetherness, and even Gonorrhea.