The Black Eyed Peas shot the video for "Just Can't Get Enough" in Japan just a week before a devastating earthquake hit the country.
Eminem spits a total of 1,560 words on "Rap God," earning him an entry in the 2015 Guinness Book of Records for "most words in a hit single."
Bobby Freeman's '50s hit "Do You Want To Dance" was also a Hot 100 hit for Del Shannon, The Beach Boys, The Mamas & the Papas, Bette Midler and the Ramones.
Britney Spears was just 16 when her first single, "Baby One More Time," was released. She quickly became a top search term on something called The Internet.
"Veronica" was inspired by Elvis Costello's grandmother, who suffered from Alzheimer's disease.
A section of verse lyrics in Rihanna's "SOS" is made up of titles from '80s hits - check out the part that starts, "Take me on, I could just die up in your arms tonight."
Long before Eminem, Justin Bieber and Nicki Minaj created alternate personas, David Bowie, Bono, Joni Mitchell and even Hank Williams took on characters.
"Great songwriters don't necessarily have hit songs," says Chris. He's written a bunch, but his fans are more interested in the intricate jams.
Did Marvin try out with the Detroit Lions? Did he fake crazy to get out of military service? And what about the cross-dressing?
Webb talks about his classic songs "By the Time I Get to Phoenix," "Wichita Lineman" and "MacArthur Park."
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.