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.
"Irreplaceable" wasn't specifically penned for Beyonce - in fact, Ne-Yo wrote it more as a country song and had Faith Hill and Shania Twain in mind.
"On The Floor" by Jennifer Lopez samples the 1989 song "Lambada," which you might remember is about "The Forbidden Dance."
"The Best" by Tina Turner was originally recorded by Bonnie Tyler; Turner's hit version added a bridge and a saxophone solo by Edgar Winter.
"Head Over Heels" by The Go-Go's is a metaphor for how things were getting out of control for the band; they broke up a year later.
Sir Mix-A-Lot is credited as a writer on The Pussycat Dolls' biggest hit, "Don't Cha," because it interpolates his 1988 song "Swass," where he goes, "Don't you wish your boyfriend was swass like me?"
With his X-wife Exene, John fronts the band X and writes their songs.
Pool balls, magpies and thorns without roses - how well do you know your Tom Waits lyrics?
How a goofy detective movie, a disenchanted director and an unlikely songwriter led to one of the biggest hits in pop history.
How well do you know this shock-rock harbinger who's been publicly executed hundreds of times?
Chad tells tales from his time as drummer for Nirvana, and talks about his group Before Cars.
