The "Mum-mum-mum-ma" hook on lady Gaga's "Poker Face" was sampled from Boney M's 1977 hit "Ma Baker."
The song "Knock On Wood" was confusing to UK listeners because the saying there is "Touch Wood."
Katy Perry co-wrote Iggy Azalea's hit single "Black Widow." Perry was originally going to sing on the track, but she couldn't fit it into her schedule, so Rita Ora provided the sung vocals instead.
"Run To You" by Bryan Adams was written for Blue Oyster Cult, and the guitar part is modeled after "Don't Fear The Reaper." BOC turned it down, so Adams recorded it for his album Reckless.
The Garbage drummer/songwriter produced the Nirvana album Nevermind, and Smashing Pumpkins' Gish and Siamese Dream.
Bradley Cooper, Michael J. Fox, Rami Malek, Reese Witherspoon, Gwyneth Paltrow and George Clooney: Which actors really sang in their movies?
Dave explains how the video appropriated the meaning of "Runaway Train," and what he thought of getting parodied by Weird Al.
Was Janet secretly married at 18? Did she gain 60 pounds for a movie role that went to Mariah Carey? See what you know about Ms. Jackson.
Tom stopped performing Thompson Twins songs in 1987, in part because of their personal nature: "Hold Me Now" came after an argument with his bandmate/girlfriend Alannah Currie.
Does he have beef with Gaga? Is he Sean Lennon's godfather? See if you can tell fact from fiction in the Elton John edition.