"Womanizer" was Britney Spears' comeback song, going to #1 about 10 months after she was institutionalized to get treatment for addictions and mental health issues.
Jay-Z's version of "99 Problems" is a cover of a 1993 song by Ice-T with the lyrics changed to be about Jay's rise to fame.
Jonah Hill directed the video for Sara Bareilles' song "Gonna Get Over You." It's a mash-up of Grease and West Side Story.
"Cotton Eye Joe" is a folk song dating to the 1800s, but it became a hit when a Swedish act called Rednex did a psychokinetic version in 1994.
Avicii's "Wake Me Up" was the first ever song to reach 200 million streams on the Spotify music streaming service.
When he met Delilah DiCrescenzo, Plain White T's lead singer Tom Higgenson told her he'd write a song about her, and came up with the first verse of "Hey There Delilah" on the spot.
Famous songs that lent their titles - and in some cases storylines - to movies.
Outrageously gifted and just plain outrageous, Millie is an R&B and Rap innovator.
An original member of Depeche Mode, Vince went on to form Erasure and Yaz.
Have you got the smarts to know which of these graduation song stories are real?
Bradley Cooper, Michael J. Fox, Rami Malek, Reese Witherspoon, Gwyneth Paltrow and George Clooney: Which actors really sang in their movies?
