Train wrote the 2011 song "Brand New Book" for the TV show The Biggest Loser - part of the song was used in the opening credits.
"Achy Breaky Heart" was originally recorded in 1991 by The Marcy Brothers as "Don't Tell My Heart." That original version had the lyrics: "Don't tell my heart, my achy, breakin' heart..."
It was never a big hit, but the uplifting "Mr. Blue Sky" has endured as Electric Light Orchestra's most popular song. Group leader Jeff Lynne wrote it when after two weeks of gloomy weather, the clouds parted to reveal a beautiful day.
The first big hit by an X Factor winner was "Bleeding Love" by Leona Lewis, who won the British version of the show in 2008. The song was intended for Jesse McCartney, who wrote it with Ryan Tedder.
Tina Turner hated "What's Love Got To Do With It" but when her manager convinced her to record it anyway, it became her big comeback hit.
"The Cave" by Mumford & Sons is based on the philosophy of Plato and his work called "Allegory of the Cave."
The former Dead Kennedys frontman on the past, present and future of the band, what music makes us "pliant and stupid," and what he learned from Alice Cooper.
Billie Jean, Delilah, Sara, Laura and Sharona - do you know who the girls in the songs really are?
When Judd Apatow needed under-appreciated rockers for his Knocked Up sequel, he immediately thought of Parker, who just happened to be getting his band The Rumour back together.
The "All I Want" singer went through a long depression, playing some shows when he didn't want to be alive.
