Justin Bieber headlined the 2015 Jingle Bell Ball in London, finishing his set with the song "Sorry."

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.

Bryan Adams and The Who perform Behind Blue Eyes, one of The Who's most well-known songs, at The Royal Albert Hall, London, in aid of the Teenage Cancer Trust.

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."

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.

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.

Minidisco presents a song that reviews the names of the family members as well as the names of the different fingers! Enjoy!

This performance of "Wonderful Tonight," one of Eric Clapton's later hits, features dynamic solos by Clapton and singer Katie Kissoon. Enjoy!

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.

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

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!

Texas rock band Z.Z. Top have been together for over forty years and are still known for their song "Gimme all your lovin'" off the album "Eliminator."