Queen are a British rock band formed in London in 1971, originally consisting of Freddie Mercury (lead vocals, piano), Brian May (guitar, vocals), John Deacon (bass guitar, guitars, vocals), and Roger Taylor (drums, vocals). Queen's earliest works were influenced by progressive rock, but the band gradually ventured into more conventional and radio-friendly works, incorporating more diverse and innovative styles in their music.

Before joining Queen, Brian May and Roger Taylor had been playing together in a band named Smile with bassist Tim Staffell. Freddie Mercury (then known as Farrokh/Freddie Bulsara) was a fan of Smile, and encouraged them to experiment with more elaborate stage and recording techniques after Staffell's departure in 1970. Mercury himself joined the band shortly thereafter, changed the name of the band to "Queen", and adopted his familiar stage name. John Deacon was recruited prior to recording their eponymous debut album (1973). Queen enjoyed success in the UK with their debut and its follow-up, Queen II (1974), but it was the release of Sheer Heart Attack (1974) and A Night at the Opera (1975) that gained the band international success. The latter featured "Bohemian Rhapsody", which stayed at number one in the UK Singles Chart for nine weeks; it charted at number one in several other territories, and gave the band their first top ten hit on the US Billboard Hot 100. Their 1977 album, News of the World, contained two of rock's most recognisable anthems, "We Will Rock You" and "We Are the Champions". By the early 1980s, Queen were one of the biggest stadium rock bands in the world, and their performance at 1985's Live Aid is regarded as one of the greatest in rock history. In 1991, Mercury died of bronchopneumonia, a complication of AIDS, and Deacon retired in 1997. Since then, May and Taylor have infrequently performed together, including a collaboration with Paul Rodgers under the name Queen + Paul Rodgers which ended in May 2009.

Elizabeth II (Elizabeth Alexandra Mary; born 21 April 1926) is the constitutional monarch of 16 sovereign states known as the Commonwealth realms, and head of the 54-member Commonwealth of Nations. She is also head of state of the Crown Dependencies.

Elizabeth was born in London, and educated privately at home. Her father acceded to the throne as George VI in 1936 on the abdication of his brother Edward VIII. She began to undertake public duties during the Second World War, in which she served in the Auxiliary Territorial Service. On the death of her father in 1952, she became Head of the Commonwealth and queen regnant of seven independent Commonwealth countries: the United Kingdom, Canada, Australia, New Zealand, South Africa, Pakistan, and Ceylon. Her coronation service in 1953 was the first to be televised. Between 1956 and 1992, the number of her realms varied as territories gained independence and some realms became republics. Today, in addition to the first four aforementioned countries, Elizabeth is Queen of Jamaica, Barbados, the Bahamas, Grenada, Papua New Guinea, the Solomon Islands, Tuvalu, Saint Lucia, Saint Vincent and the Grenadines, Belize, Antigua and Barbuda, and Saint Kitts and Nevis.

Brian Harold May, CBE (born 19 July 1947) is an English musician and astrophysicist most widely known as the guitarist, songwriter and occasional singer of the rock band Queen. As a guitarist he uses his home-built guitar, "Red Special", and has composed hits such as "Tie Your Mother Down", "I Want It All", "We Will Rock You", "Fat Bottomed Girls" and "Who Wants to Live Forever".

He was made Commander of the Order of the British Empire in 2005 for "services to the music industry and his charity work". May earned a PhD in astrophysics from Imperial College in 2007 and is currently the Chancellor of Liverpool John Moores University. May currently resides in Surrey.

In 2005, a Planet Rock poll saw May voted the 7th greatest guitarist of all time. He was ranked at No. 26 on Rolling Stone magazine's list of the "100 Greatest Guitarists of All Time".

Brian May, the only child of Harold and Ruth May, was born in Hampton, London and attended Hampton Grammar School (now Hampton School). During this time he formed his first band with vocalist and bassist Tim Staffell, named Nineteen Eighty-Four after George Orwell's novel of the same name. He left Hampton Grammar School with ten GCE Ordinary Levels and three Advanced Levels in Physics, Mathematics and Applied Mathematics. He studied Mathematics and Physics at Imperial College London, graduating with B.Sc. degree with honours.

Sir James Paul McCartney, MBE, Hon RAM, FRCM (born 18 June 1942) is an English musician, singer-songwriter and composer. Formerly of the Beatles (1960–1970) and Wings (1971–1981), he has been described by Guinness World Records as "The Most Successful Composer and Recording Artist of All Time", with 60 gold discs and sales of over 100 million albums and 100 million singles. With John Lennon, George Harrison, and Ringo Starr, he gained worldwide fame as a member of the Beatles, and with Lennon formed one of the most celebrated songwriting partnerships of the 20th century. After leaving the Beatles, he began a solo career and later formed the band Wings with his first wife, Linda Eastman, and singer-songwriter Denny Laine.

According to the BBC, his Beatles song "Yesterday" has been covered by over 2,200 artists—more than any other song. Wings' 1977 release, "Mull of Kintyre", became one of the best-selling singles ever in the UK, and he is "the most successful songwriter" in UK chart history, according to Guinness. As a songwriter or co-writer, he is included on thirty-one number one titles on the Billboard Hot 100, and as of 2012 he has sold over 15.5 million RIAA certified units in the United States.

Eric Patrick Clapton, CBE, (born 30 March 1945) is an English guitarist and singer-songwriter. Clapton is the only three-time inductee to the Rock and Roll Hall of Fame: once as a solo artist, and separately as a member of The Yardbirds and Cream. Clapton has been referred to as one of the most important and influential guitarists of all time. Clapton ranked second in Rolling Stone magazine's list of the "100 Greatest Guitarists of All Time" and fourth in Gibson's Top 50 Guitarists of All Time.

In the mid 1960s, Clapton departed from the Yardbirds to play blues with John Mayall & the Bluesbreakers. In his one-year stay with Mayall, Clapton gained the nickname "Slowhand". Immediately after leaving Mayall, Clapton formed Cream, a power trio with drummer Ginger Baker and bassist Jack Bruce in which Clapton played sustained blues improvisations and "arty, blues-based psychedelic pop." For most of the 1970s, Clapton's output bore the influence of the mellow style of J.J. Cale and the reggae of Bob Marley. His version of Marley's "I Shot the Sheriff" helped reggae reach a mass market. Two of his most popular recordings were "Layla", recorded by Derek and the Dominos, another band he formed and Robert Johnson's "Crossroads", recorded by Cream. A recipient of seventeen Grammy Awards, in 2004 Clapton was awarded a CBE for services to music. In 1998, Clapton, a recovering alcoholic and drug addict, founded the Crossroads Centre on Antigua, a medical facility for recovering substance abusers.