"All You Need Is Love" is a song written by John Lennon and credited to Lennon–McCartney. It was first performed by The Beatles on Our World, the first live global television link. Watched by 400 million in 26 countries, the programme was broadcast via satellite on 25 June 1967. The BBC had commissioned The Beatles to write a song for the United Kingdom's contribution.

The Beatles were asked to come up with a song containing a simple message to be understood by all nationalities. "It was an inspired song and they really wanted to give the world a message," said Brian Epstein. "The nice thing about it is that it cannot be misinterpreted. It is a clear message saying that love is everything." According to journalist Jade Wright, "Lennon was fascinated by the power of slogans to unite people and never afraid to create art out of propaganda. When asked in 1971 whether songs like "Give Peace a Chance" and "Power to the People" were propaganda songs, he answered: 'Sure. So was All You Need Is Love. I'm a revolutionary artist. My art is dedicated to change.'"

John Roger Stephens (born December 28, 1978), better known by his stage name John Legend, is an American singer-songwriter and actor. He has won nine Grammy Awards, and in 2007, he received the special Starlight award from the Songwriters Hall of Fame.

Prior to the release of his debut album, Stephens' career gained momentum through a series of successful collaborations with multiple established artists. Stephens added his voice to those of other artists, assisting in them reaching chart-topper hits. He lent his voice to Kanye West's All of the Lights, on Slum Village's "Selfish" and Dilated Peoples' "This Way". Other artists included Jay-Z's "Encore", and he sang backing vocals on Alicia Keys' 2003 song "You Don't Know My Name" and Fort Minor's "High Road." Stephens played piano on Lauryn Hill's "Everything Is Everything."

Stephens was born on December 28, 1978, in Springfield, Ohio. He is the son of Phyllis, a seamstress, and John Mills, a factory worker and former National Guardsman. Throughout his childhood, Stephens was homeschooled on and off by his mother. At the age of four, he began playing the piano and at the age of seven, he performed with his church choir. When he was ten, his parents divorced, causing his mother to suffer a breakdown. At the age of 12, Stephens attended North High School, from which he graduated four years later. He graduated salutatorian.

Lindsey Stirling (born on September 21, 1986) is an American violinist, musician, dancer, performance artist, and composer. In 2010 she competed on the fifth season of America's Got Talent. Stirling is noted for her versatility performing music from country to hip hop.

At the age of 23 Stirling was a quarter-finalist on the fifth season of America's Got Talent where she was known as the ‘Hip Hop Violinist’. After Stirling's performance, Sharon Osbourne said, "Wow... we love you Lindsey!” and Piers Morgan called her performance "Electrifying!".

At the age of 5, after being influenced by the classic music records played by her father, Stirling requested the opportunity to learn and play the violin.

Stirling was classically trained through private lessons for 12 years. When she was 16, she joined a rock band with four friends called Stomp on Melvin. As part of her experience with Stomp on Melvin, Stirling wrote a solo violin rock song, and her performance helped her to win both the title of Arizona’s Jr. Miss in 2005 and the talent category of the National Jr. Miss Pageant. As of May 2, 2012, Stirling is 5'3" tall.

Janet Damita Jo Jackson (born May 16, 1966) is an American recording artist and actress. Known for a series of sonically innovative, socially conscious and sexually provocative records, as well as elaborate stage shows, television and film roles, she has been a prominent figure in popular culture for over 25 years. The youngest child of the Jackson family, she began her career with the variety television series The Jacksons in 1976 and went on to appear in other television shows throughout the 1970s and early 1980s, including Good Times and Fame.

After signing a recording contract with A&M in 1982, she came to prominence following the release of her third studio album Control (1986). Her collaborations with record producers Jimmy Jam and Terry Lewis incorporated elements of rhythm and blues, funk, disco, rap, and industrial beats, which led to crossover appeal in popular music. In addition to receiving recognition for the innovation in her records, choreography, music videos, and prominence on radio airplay and MTV, she was acknowledged as a role model for her socially conscious lyrics.

Jennifer Nettles (born September 12, 1974 in Douglas, Georgia) is an American country music artist. She is known primarily for her role as lead vocalist of the duo Sugarland alongside Kristian Bush. Before Sugarland's inception, she also fronted Atlanta, Georgia-based bands called Soul Miner's Daughter and Jennifer Nettles Band. She also charted as a duet partner on the country version of rock band Bon Jovi's 2006 single "Who Says You Can't Go Home", a Number One hit on the Billboard country charts.

Nettles is a judge on American Broadcast Company's Duets which premiered on May 24, 2012.

Nettles began performing at school assemblies, her Southern Baptist church, and in community theater. She was also a member of Georgia 4-H's Clovers & Company performing arts group from 1986 to 1993.

Nettles studied Sociology and Anthropology at Agnes Scott College in Decatur, Georgia and graduated in 1997. While a student there, Nettles and Cory Jones (who at the time was studying classical guitar at the University of Georgia) formed the group Soul Miner’s Daughter. Performing as both an acoustic duo and with a band, they released two albums: The Sacred and Profane in 1996 and Hallelujah in 1998, both of which were composed of songs written collaboratively by Jones and Nettles. Soul Miner's Daughter was invited to perform at the Atlanta installment of Lilith Fair in 1999.