Blues is the name given to both a musical form and a music genre that originated in African-American communities of primarily the "Deep South" of the United States around the end of the 19th century from spirituals, work songs, field hollers, shouts and chants, and rhymed simple narrative ballads. The blues form, ubiquitous in jazz, rhythm and blues, and rock and roll is characterized by specific chord progressions, of which the twelve-bar blues chord progression is the most common. The blue notes that, for expressive purposes are sung or played flattened or gradually bent (minor 3rd to major 3rd) in relation to the pitch of the major scale, are also an important part of the sound.

The blues genre is based on the blues form but possesses other characteristics such as specific lyrics, bass lines and instruments. Blues can be subdivided into several subgenres ranging from country to urban blues that were more or less popular during different periods of the 20th century. Best known are the Delta, Piedmont, Jump and Chicago blues styles. World War II marked the transition from acoustic to electric blues and the progressive opening of blues music to a wider audience, especially white listeners. In the 1960s and 1970s, a hybrid form called blues-rock evolved.

Robert William Gary Moore (4 April 1952 – 6 February 2011), was a Northern Irish musician, most widely recognised as a blues singer and guitarist.

In a career dating back to the 1960s, Moore played with artists including Phil Lynott and Brian Downey during his teens, leading him to memberships with the Irish bands Skid Row and Thin Lizzy on three separate occasions. Moore shared the stage with such blues and rock luminaries as B.B. King, Albert King, Colosseum II, George Harrison and Greg Lake, as well as having a successful solo career. He guested on a number of albums recorded by high profile musicians, including a cameo appearance playing the lead guitar solo on "She's My Baby" from Traveling Wilburys Vol. 3.

Moore started performing at a young age, having picked up a battered acoustic guitar at the age of eight. He got his first quality guitar at the age of 14, learning to play the right-handed instrument in the standard way despite being left-handed. He moved to Dublin in 1968 at the age of 16. His early musical influences were artists such as Albert King, Elvis Presley, The Shadows and The Beatles. Later, having seen Jimi Hendrix and John Mayall's Bluesbreakers in his home town of Belfast, his own style was developing into a blues-rock sound that would be the dominant form of his career in music.

John Lee Hooker (August 22, 1917 – June 21, 2001) was a highly influential American blues singer-songwriter and guitarist.

Hooker began his life as the son of a sharecropper, William Hooker, and rose to prominence performing his own unique style of what was originally a unique brand of country blues. He developed a 'talking blues' style that was his trademark. Though similar to the early Delta blues, his music was metrically free. John Lee Hooker could be said to embody his own unique genre of the blues, often incorporating the boogie-woogie piano style and a driving rhythm into his blues guitar playing and singing. His best known songs include "Boogie Chillen'" (1948), "I'm in the Mood" (1951) and "Boom Boom" (1962), the first two reaching R&B #1 in the Billboard charts.

There is some debate as to the year of Hooker's birth in Coahoma County, Mississippi, the youngest of the eleven children of William Hooker (1871–1923), a sharecropper and Baptist preacher, and Minnie Ramsey (born 1875, date of death unknown); according to his official website, he was born on August 22, 1917.

John Clayton Mayer ( /ˈmeɪ.ər/ MAY-ər; (born October 16, 1977) is an American pop and blues rock musician, singer-songwriter, recording artist, and music producer. Born in Bridgeport, Connecticut and raised in Fairfield, Connecticut, he attended Berklee College of Music in Boston. He moved to Atlanta in 1997, where he refined his skills and gained a following, and he now lives in New York City. His first two studio albums, Room for Squares and Heavier Things, did well commercially, achieving multi-platinum status. In 2003, he won a Grammy Award for Best Male Pop Vocal Performance for "Your Body Is a Wonderland."

Mayer began his career performing mainly acoustic rock, but gradually began a transition towards the blues genre in 2005 by collaborating with renowned blues artists such as B. B. King, Buddy Guy, and Eric Clapton, and by forming the John Mayer Trio. The blues influence can be heard throughout his 2005 live album Try! with the John Mayer Trio and his third studio album Continuum, released in September 2006. At the 49th Annual Grammy Awards in 2007 Mayer won Best Pop Vocal Album for Continuum and Best Male Pop Vocal Performance for "Waiting on the World to Change". He released his fourth studio album, Battle Studies, in November 2009. His fifth album, Born and Raised, was released on May 22, 2012. He has sold over 10 million albums in the U.S. and 20 million albums worldwide.

Walter Bruce Willis (born March 19, 1955) is a German-born American actor, producer, and musician. His career began in television in the 1980s and has continued both in television and film since, including comedic, dramatic, and action roles. He is well known for the role of John McClane in the Die Hard series, which were mostly critical and uniformly financial successes. He has also appeared in over sixty films, including box office successes like Pulp Fiction (1994), 12 Monkeys (1995), The Fifth Element (1997), Armageddon (1998), The Sixth Sense (1999), Unbreakable (2000), Sin City (2005), Over the Hedge (2006) and Red (2010).

Motion pictures featuring Willis have grossed US$2.64 billion to 3.05 billion at North American box offices, making him the ninth highest-grossing actor in a leading role and twelfth highest including supporting roles. He is a two-time Emmy Award–winning, Golden Globe Award–winning and four-time Saturn Award–nominated actor. Willis was married to actress Demi Moore and they had three daughters before their divorce in 2000, following thirteen years of marriage. He is currently married to model Emma Heming, with whom he has one daughter.