If you have a whole day to kill, you can check out the full version of Pharrell Williams' "Happy" music clip, which was the world's first ever 24-hour music video.
Featured in the 1978 musical Evita, "Don't Cry For Me Argentina" became the biggest selling UK hit by a female vocalist (Julie Covington).
"Stay" by Shakespears Sister is based on a 1953 B-movie called Cat-Women Of The Moon.
"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 recorded it themselves.
Clarence Clemons, who played the sax in Bruce Springsteen's E Street Band, had the biggest solo hit of anyone in the group - aside from Springsteen - when "You're A Friend Of Mine" hit #18 in 1985.
Paul McCartney wrote "Hey Jude" to comfort John Lennon's 5-year-old son Julian, whose parents were getting a divorce.
Dave reveals the inspiration for "Feelin' Alright" and explains how the first song he ever wrote became the biggest hit for his band Traffic.
Dan cracked the Top 40 with "Ritual," then went to India and spent 2 hours with the Dalai Lama.
Martyn talks about producing Tina Turner, some Heaven 17 hits, and his work with the British Electric Foundation.
The writer of "Rainy Night in Georgia" and "Polk Salad Annie" explains how he cooks up his Louisiana swamp rock.
The Def Leppard frontman talks about their "lamentable" hit he never thought of as a single, and why he's juiced by his Mott The Hoople cover band.
Genesis' key-man re-examines his solo career and the early days of music video.