Queen are an English rock band formed in 1970 in London by guitarist Brian May, lead vocalist Freddie Mercury, and drummer Roger Taylor. Bass guitarist John Deacon joined the following year, completing the band as it would remain until Mercury's death on November 24, 1991. It is uncertain how many albums the band has sold, but estimations range from 130 million to over 300 million albums worldwide.

The band is noted for their musical diversity, multi-layered arrangements, vocal harmonies, and incorporation of audience participation into their live performances. Their 1985 Live Aid performance was voted the best live rock performance of all time in an industry poll.

Queen had moderate success in the early 1970s, with the albums Queen and Queen II, but it was with the release of Sheer Heart Attack in 1974 and A Night at the Opera the following year that the band gained international success. They have released fifteen studio albums, five live albums, and numerous compilation albums. Eighteen of these have reached number one on charts around the world.

Following Mercury's death in 1991 and Deacon's retirement later in the decade,May and Taylor have performed infrequently under the Queen name. Since 2005 they have been collaborating with Paul Rodgers, under the moniker Queen + Paul Rodgers.

As of 2005, according to The Guinness Book of World Records, Queen albums have spent a total of 1,322 weeks or twenty-seven years on the United Kingdom album charts; more time than any other musical act including The Beatles and Elvis Presley. Also in 2005, with the release of their live album with Paul Rodgers, Queen moved into third place on the list of acts with the most aggregate time spent on the British record charts.

Queen composed music that drew inspiration from many different genres of music, often with a tongue-in-cheek attitude. Among the genres they have been associated with are: dance/disco, glam rock, hard rock, heavy metal, pop rock, progressive rock and psychedelic rock.Queen also wrote songs that were inspired by genres that are not typically associated with rock, such as country, ragtime, opera, gospel, vaudeville and folk.

Sonic experimentation figured heavily in Queen's songs. A distinctive characteristic of Queen's music are the vocal harmonies which are usually comprised of the voices of May, Mercury and Taylor best heard on the studio albums A Night at the Opera and A Day at the Races. Some of the ground work for the development of this sound can be attributed to their former producer Roy Thomas Baker as well as their engineer Mike Stone. Besides vocal harmonies, Queen were also known for multi-tracking voices to imitate the sound of a large choir through overdubs. According to Brian May, there are over 180 vocal overdubs in "Bohemian Rhapsody".Many Queen songs were also written with audience participation in mind, such as "We Will Rock You" and "We Are the Champions".

In 2006, the Greatest Hits album was found to be the United Kingdom's all-time best selling album, with sales upwards of 5,407,587 copies, over 604,295 more copies than its nearest competitor, The Beatles' Sgt. Pepper's Lonely Hearts Club Band. Their Greatest Hits II album came in seventh with sales upwards of 3,631,321 copies.

One of rock's most successful, influential and popular acts, the band has released a total of eighteen number one albums, eighteen number one singles, and ten number one DVDs worldwide making them one of the world's best-selling music artists. Their total album sales have been estimated at over 300 million worldwide including 32.5 million in the United States alone as of 2004. The band is also the only group in which every member has composed more than one chart-topping single.