After 47 visits to the Hot 100, Justin Bieber topped the tally for the first time on September 17, 2015 with "What Do You Mean?"
The instrumental "YYZ" by Rush got its title from the transmitter code for Toronto's Lester B. Pearson International Airport, near where the band is from.
Meghan Trainor wrote "Lips Are Movin" in just eight minutes with her writing partner Kevin Kadish.
John Lennon wrote "The Continuing Story of Bungalow Bill" about Richard Cooke, a hunter he met at the Maharishi's camp in India. Cooke hasn't shot anything since the camp, except with his camera - he became a freelance photographer for National Geographic.
The lyric to "Hold On" by Wilson Phillips was inspired by Chynna Phillips' struggles with addiction. "Hold on for one more day" is something she heard in AA meetings.
"Dead Skunk" became a stinker for Loudon when he felt pressure to make another hit - his latest songs deal with mortality, his son Rufus, and picking up poop.
How well do you know this shock-rock harbinger who's been publicly executed hundreds of times?
The man who created Yacht Rock with "Sailing" wrote one of his biggest hits while on acid.
Go beyond The Beatles to see what you know about the British Invasion.
The in-depth discussion about the making of Jesus Christ Superstar with Ted Neeley, who played Jesus in the 1973 film.