David Gilmour of the legendary British rock band Pink Floyd performs "Wish You Were Here" live and unplugged.

Ed Sheeran performs an acoustic version of his song "Photograph," which has been certified double platinum in several countries.

Selena Gomez tells us the stories behind her most talked about Instagram photos.

Hawaiian musician, entertainer, and sovereignty activist Israel "IZ" Kamakawiwo'ole helped to popularize and change perceptions of Hawaiian music. This video with his version of "Somewhere over the Rainbow" includes footage from his funeral, attended by roughly ten thousand people, and the scattering of his ashes.

Pop legends Sting, Bryan Adams, and Rod Stewart come together to sing this ballad "All For Love."

Is there a difference between college and university in the United States? What about high school? All that and more is explained in this video!

U2 singer Bono's vocal talent is showcased in this breathtaking performance of "Every Breaking Wave" at the MTV Europe Music Awards 2014.

Taylor Swift's song "Wildest Dreams" was the fifth chart-topper from her album 1989. The music video, directed by Joseph Kahn, references classic Hollywood romances.

Steve Skaith of the English band Latin Quarter plays "The Spearcarrier." A "spear carrier" is a nickname for a character in a movie or play who appears only in the background, generally in a non-speaking role.

Taylor Swift discusses her song "Out of the Woods" and why it is representative of the goal she had for her album 1989.

Justin James is a singer from Vancouver, British Columbia. This song is from his record Islands.

Justin James began writing songs when he was 20 years old and now tours the world performing his music. Releases include Islands (2013), A Beautiful Life (2011), Perfect Sometimes (2009), and Sun Drenched (2007). In this video, you can hear many samples of his songs in performances and music videos.

Penny invents a quiz to find out whether Sheldon or Leonard is smarter, which only reveals that both of them are completely uninformed about popular culture with the exception of Star Trek.

James Bay is an English singer-songwriter and guitarist. His single "Hold Back the River" is certified platinum and appears on his debut album "Chaos and the Calm."

Enjoy this excerpt of Led Zeppelin performing "Stairway to Heaven" at Earls Court. Written by guitarist Jimmy Page and vocalist Robert Plant, the song is widely acknowledged as one of the greatest rock songs of all time.