In 1939, a polka craze swept America thanks to "Beer Barrel Polka (Roll Out The Barrel)."
When Keith Urban played "Somebody Like You" for his girlfriend, she called him a hypocrite because he "sucked at relationships."
Rihanna was Pitbull's first choice to sing on "Timber," but she wasn't available at the time so he enlisted his RCA labelmate Kesha instead.
"Rhythm Of My Heart" by Rod Stewart is about a soldier at war - his heart is beating like a drum because he's in battle.
"The Reflex" became a #1 hit for Duran Duran when Nile Rodgers remixed it using a sampler. Simon Le Bon refuses to say what it's about, but says it's "kind of childish song."
The voice is that says "here we go" in the AJR song "Bang!" belongs to Charlie Pellett, the announcer on the New York City subway ("stand clear of the closing doors, please").
Zac tells the story of Hanson's massive hit "MMMbop," and talks about how brotherly bonds effect their music.
In this talk from the '80s, the Kansas frontman talks turning to God and writing "Dust In The Wind."
Rob Thomas on his Social Distance Sessions, co-starring with a camel, and his friendship with Carlos Santana.
The guy who brought us "Stacy's Mom" also wrote the Jane Lynch Emmy song and Stephen Colbert's Christmas songs.
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.
The powerhouse producer behind Janet Jackson's hits talks about his Boyz II Men ballads and regrouping The Time.