"Irreplaceable" wasn't specifically penned for Beyonce - in fact, Ne-Yo wrote it more as a country song and had Faith Hill and Shania Twain in mind.
The first Eurodance hit in America was "Pump Up The Jam" by Technotronic in 1989. It led to a wave of Eurodance hits from the likes of Black Box, Snap! and C+C Music Factory in the early '90s.
In Gary Numan's "Cars," the message is that cars lead to a mechanical society devoid of personal interaction. This didn't stop automakers from using it in commercials. Both Nissan and Oldsmobile have used it in ads.
Ellie Goulding's hit single "Burn" was originally demoed by Leona Lewis for her 2011 Glassheart album. She scrapped the tune when the project was retooled to include more ballads.
"Thinking About You" was the ninth track from Calvin Harris' 18 Months album to enter the UK singles Top 10. No other artist has obtained so many hits from one LP - Michael Jackson was the previous record holder with seven Top 10 tunes from both his Bad and Dangerous sets.
Carla Thomas became the first woman to achieve a Top 10 hit on the Hot 100 with a song she wrote herself when "Gee Whiz (Look At His Eyes)" reached #10 in 1961. Thomas was just 16 years old when she wrote it.
The Scorpions and UFO guitarist is also a very prolific songwriter - he explains how he writes with his various groups, and why he was so keen to get out of Germany and into England.
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.
The "A Thousand Miles" singer on what she thinks of her song being used in White Chicks and how she captured a song from a dream.
Richie talks about the impact of "Amazed," and how his 4-year-old son inspired another Lonestar hit.
When you have a song called "Fire," it's tempting to set one - these guys did.
Armed with a childhood spent devouring books, Mike Scott's heart was stolen by the punk rock scene of 1977. Not surprisingly, he would go on to become the most literate of rockers.