"A Hard Day's Night" was the title song to The Beatles' first movie, which was surprisingly good: it was nominated for two Oscars.
One of Tom Petty's most personal songs is "Room At The Top," which he stopped performing because it brought back painful memories.
The hit duet "Somewhere Out There" was written for an animated film about a family of immigrant mice who lose one of their young.
Shakira calls her sons Milan and Sasha her "Waka Kids" because she met their father, Spanish soccer star Gerard Piqué, on the video shoot for "Waka Waka (This Time For Africa)," the official song of the 2010 FIFA World Cup in South Africa.
"Here I Go Again" was a #1 hit for Whitesnake in 1987, but it was first released in 1982 with the lyric, "Like a hobo I was born to walk alone."
Lily Allen wrote "Something's Not Right" for the soundtrack of the Peter Pan prequel, Pan. The song was inspired by the heartache that Allen experienced after suffering a miscarriage when she was six months pregnant with her first child by husband Sam Cooper in 2010.
Guitarist Tony Iommi on the "Iron Man" riff, the definitive Black Sabbath song, and how Ozzy and Dio compared as songwriters.
From "Some Day My Prince Will Come" to "Let It Go" - how Disney princess songs (and the women who sing them) have evolved.
Steppenwolf frontman John Kay talks about "Magic Carpet Ride," "Born To Be Wild," and what he values more than awards and accolades.
Harry is Derek Smalls in Spinal Tap, Mark Shubb in The Folksmen, and Mr. Burns on The Simpsons.
When singers started spoofing their own songs on Sesame Street, the results were both educational and hilarious - here are the best of them.
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.