
The "Mum-mum-mum-ma" hook on lady Gaga's "Poker Face" was sampled from Boney M's 1977 hit "Ma Baker."

ABBA's Bjorn Ulvaeus and Benny Andersson conceived "Dancing Queen" as a dance song with the working title "Boogaloo," drawing inspiration from the 1974 George McCrae disco hit "Rock Your Baby." Their manager Stig Anderson came up with the title "Dancing Queen."

Jay-Z was going to ask Mary J. Blige to duet on "Empire State of Mind," but he decided on Alicia Keys when he heard the piano stabs on the track.

"Rhiannon" is a Welch goddess. Stevie Nicks wrote the song, and it was a huge influence on her image, inspiring her flowing shawls and black outfits she began wearing on stage.

In the late '70s, John Lennon slowed his roll, becoming a househusband who baked bread and took care of his young son Sean. This inspired his song "Watching The Wheels," where he discovers the benefits of taking it easy.

Avril Lavigne's 2011 song "Darlin" was written much earlier; she says it's the second song she ever wrote, composed when she was an unsigned 15-year-old living in Napanee, Ontario. The song reflects those years when she was "trying to figure it all out."
Billie Jean, Delilah, Sara, Laura and Sharona - do you know who the girls in the songs really are?
The country sweetheart opines about the demands of touring and talks about writing songs with her famous father.
Elvis, Little Richard and Cheryl Cole have all sung about Teddy Bears, but there is also a terrifying Teddy song from 1932 and a touching trucker Teddy tune from 1976.
Lita talks about how they wrote songs in The Runaways, and how she feels about her biggest hit being written by somebody else.
The man who created Yacht Rock with "Sailing" wrote one of his biggest hits while on acid.
If you can recall the days when MTV played videos, you know that there are lots of stories to tell. See if you can spot the real ones.