One of the last hits with a track made up almost entirely of uncleared samples is "Groove Is In The Heart" by Deee-Lite in 1990. Soon after, courts ruled that samples needed to be cleared.
"Gangnam Style" refers to a section of Seoul, South Korea, that is very fashionable. The guy in the song has all the right moves and loves the ladies.
Rapper Memphis Bleek's 2005 album track "The One" is notable for featuring a then-unknown Rihanna on the hook. It was the Barbadian singer's first-ever major-label appearance.
The most famous song to prominently feature a French horn is "God Only Knows" by The Beach Boys.
Tired of X-Factor winners getting the UK Christmas #1, British Facebook users staged a successful campaign to download "Killing In The Name" by Rage Against The Machine enough times to boost the song to the top in 2009, blocking the X-Factor single by Joe McElderry.
Sia planned to quit her solo career after her 2014 album 1000 Forms of Fear, but the "Chandelier" video proved so popular it drew her back in.
His keyboard work helped define the Muscle Shoals sound and make him an integral part of many Neil Young recordings. Spooner is also an accomplished songwriter, whose hits include "I'm Your Puppet" and "Cry Like A Baby."
Greg talks about writing songs of "universal truth" for King Crimson and ELP, and tells us about his most memorable stage moment (it involves fireworks).
The "All I Want" singer went through a long depression, playing some shows when he didn't want to be alive.
Lori's songs have been recorded by Faith Hill and Sara Evans. She's performed on the CMAs and on Oprah. She also has five kids.
The lead singer and pianist for Procol Harum, Gary talks about finding the musical ideas to match the words.
