"Lean On" was originally sent by Major Lazer to both Rihanna and Nicki Minaj's camps as a slower reggae track. After both parties rejected the tune, Major Lazer recruited Danish singer MØ to supply vocals and they recorded it themselves.
Sheryl Crow's "Soak Up The Sun" isn't as lighthearted as it seems: the song deals with the prevailing head-in-the-sand reaction to climate change.
Pink Floyd's "Talkin' Hawkin'" uses a sample of Stephen Hawking's synthesized voice taken from a speech he made for a 1994 British Telecom commercial.
Dolly Parton wrote her #1 hit "9 to 5" for the 1980 movie she starred in as a secretary. The film is a comedy and the song has a lighthearted feel, but the message of gender discrimination in the office was very real. Both the song and movie helped bring the issue to the fore.
The Starland Vocal Band got the title "Afternoon Delight" from the late-afternoon appetizer menu at the restaurant Clyde's Of Georgetown in Washington, DC.
Imagine Dragons lead singer Dan Reynolds says their 2012 hit "Radioactive" is "a song about having an awakening; kind of waking up one day and deciding to do something new, and see life in a fresh way."
Don breaks down "Hotel California" and other songs he wrote as a member of the Eagles. Now we know where the "warm smell of colitas" came from.
Medley looks back on "Unchained Melody" and "You've Lost That Lovin' Feelin'" - his huge hits from the '60s that were later revived in movies.
A renowned guitarist and rock revivalist, Dave took "I Hear You Knocking" to the top of the UK charts and was the first to record Elvis Costello's "Girls Talk."
Joe talks about the challenges of of making a Duke Ellington tribute album, and tells the stories behind some of his hits.
Jon Fratelli talks about the band's third album, and the five-year break leading up to it.
