Roots of Melissa Etheridge

Ladysmith Black Mambazo is a South African male choral group singing in the local vocal styles of isicathamiya and mbube. They became known internationally recognised after singing with American Paul Simon on his 1986 album Graceland. They have since won multiple awards, including five Grammy Awards the fifth of which they dedicated to the late former South African President Nelson Mandela.

"Happy Xmas (War Is Over)" is a 1971 Christmas song released as a single by the Plastic Ono Band with the Harlem Community Choir. It was the seventh single issued by John Lennon outside his work with the Beatles. The song reached number four in the United Kingdom, where its release was delayed until November 1972, and has periodically returned to the UK Singles Chart, most notably after Lennon's murder in December 1980, when it peaked at number two.

"Piece of My Heart" is a romantic soul song written by Jerry Ragovoy and Bert Berns, originally recorded by American gospel and soul singer Erma Franklin in 1967. Franklin's single peaked in December 1967 at number 10 on the Billboard Hot Rhythm & Blues Singles chart in the United States.