An unexpected guest vocal: Marianne Faithfull on the Metallica song "The Memory Remains." A star in the '60s, this collaboration helped revive her career.
Debbie Gibson was 17 years old when "Foolish Beat" topped the Hot 100. This gave her the honor of becoming the youngest artist ever to write, perform, and produce a #1 single.
The love is growing in the '70s hit "Love Grows (Where My Rosemary Goes)" because rosemary is the name of an herb.
"Baby One More Time" was originally offered to TLC but they passed on it. The R&B trio felt uncomfortable singing "'hit me baby one more time."
Rapper Memphis Bleek's 2005 album track "The One" is notable for featuring a then-unknown Rihanna on the hook. It was the Barbadian singer's first-ever major-label appearance.
Grazing In The Grass by The Friends Of Distinction was the first big hit to use the phrase "dig it" in the lyric.
"London Bridge," "Ring Around the Rosie" and "It's Raining, It's Pouring" are just a few examples of shockingly morbid children's songs.
Smith breaks down some of his worship tracks as well as his mainstream hits, including "I Will Be Here For You" and "A Place In This World."
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.
Our chat with Barney Hoskyns, who covers the wild years of Woodstock - the town, not the festival - in his book Small Town Talk.
Justin wrote the classic "Nights In White Satin," but his fondest musical memories are from a different decade.
How well do you know your protest songs (including the one that went to #1)?