Feist's "1234" is "about lost love, and the hope to recapture what you once had," but it's best known for the Sesame Street version about counting to four.
An unexpected guest vocal: Marianne Faithfull on the Metallica song "The Memory Remains." A star in the '60s, this collaboration helped revive her career.
Bono wrote U2's song "Sweetest Thing" for his wife to make up for working on her birthday. For the video, he staged an "apology parade," complete with Irish step dancers and an elephant.
Bing Crosby debuted the song "White Christmas" in the 1942 movie Holiday Inn, where he plays a New Yorker stuck in Southern California for Christmas and missing the snow. The song became a Christmas classic and the basis for the 1954 movie White Christmas, also starring Crosby.
The Beastie Boys' "No Sleep Till Brooklyn" is a parody of heavy metal music. Kerry King of Slayer played guitar on the track - purposefully out of tune in parts.
"All I Want For Christmas Is You" by Mariah Carey was the first ringtone certified Gold.
Wes Edwards takes us behind the scenes of videos he shot for Jason Aldean, Dierks Bentley and Chase Bryant. The train was real - the airplane was not.
The longtime BS&T frontman tells the "Spinning Wheel" story, including the line he got from Joni Mitchell.
Elvis, Little Richard and Cheryl Cole have all sung about Teddy Bears, but there is also a terrifying Teddy song from 1932 and a touching trucker Teddy tune from 1976.
Harry is Derek Smalls in Spinal Tap, Mark Shubb in The Folksmen, and Mr. Burns on The Simpsons.
Just like Darrin was replaced on Bewitched, groups have swapped out original members, hoping we wouldn't notice.
One of the first successful female singer-songwriters, Janis had her first hit in 1967 at age 15.