In the UK, Michael Jackson's "Thriller" returns to the chart every Halloween, a tradition started in 2007.
Dan Tyminski, the singer on Avicii's "Hey Brother" is the same guy who sang lead vocal on "A Man Of Constant Sorrow" in the movie O’ Brother, Where Art Thou.
The first single to simultaneously top the UK and US charts was The Everly Brothers' "Cathy's Clown" in May 1960.
"One Week" by Barenaked Ladies was a #1 hit in America - for exactly one week in 1998.
Sir Mix-A-Lot says he's earned over $100 million from "Baby Got Back." He wrote the song and owns the publishing rights, so he can authorize its use in movies, TV shows and commercials, which he often does.
Lil Wayne does an unlikely rap in a remix of the Joe Jonas song "Just In Love." The pair met at the 2008 MTV Video Music Awards.
John Lennon, Paul Simon and Lynyrd Skynyrd are some of the artists who have written revenge songs. Do you know who they wrote them about?
"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.
A top country songwriter, Barry talks about writing hits for Little Big Town, Tim McGraw and Jason Aldean.
Dean wrote the screenplay and lyrics to all the songs in Footloose. His other hits include "Fame" and "All The Man That I Need."
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.
Rick Astley on "Never Gonna Give You Up," "Cry For Help," and his remarkable resurgence that gave him another #1 UK album.