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.
Phil Collins' "Take Me Home" is about a patient in a mental institution and was inspired by the novel One Flew Over the Cuckoo's Nest.
Weird Al Yankovic proposed a parody of "Black Or White" called "Snack All Night," but Michael Jackson asked him not to.
The title "25 Or 6 To 4" by Chicago refers to the time it was written: either 25 minutes to 4 (3:35) or 26 (3:34).
Recording "Don't Let The Sun Go Down On Me," Elton John was frustrated and sang the line "don't discard me" with an exaggerated American accent, which is why is sounds strange.
AC/DC's 1990 song "Mistress For Christmas" is about Donald Trump, who was in the news because of his affair with the model Marla Maples.
The renown rock singer talks about "The House of the Rising Sun" and "Don't Let Me Be Misunderstood."
Can you be married in one country but not another? Only if you're part of a gay couple. One of the first famous singers to come out as a lesbian, Janis wrote a song about it.
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.
Surprise exits, a catfight and some very memorable performances make our list of the most memorable Idol moments.
Fishbone has always enjoyed much more acclaim than popularity - Angelo might know why.
The Bush frontman on where he finds inspiration for lyrics, if his "machine head" is a guitar tuner, and the stories behind songs from the album The Kingdom.