Short answers, pulled from the story.
The band Queen was founded by Roger Taylor and Brian May, who originally played in a band called Smile. Freddie Mercury joined the group after the original singer left and changed the band's name to Queen.
The song Bohemian Rhapsody was released in 1975 as part of the album A Night at the Opera. The recording process utilized 180 overdubs to create the complex layered vocals and operatic sections.
Queen performed their largest concert in South America at the Vélez Sarsfield Stadium in Buenos Aires. The event drew an audience of 300,000 people, which remains the largest single concert crowd in Argentine history.
Freddie Mercury died on the 23rd of November 1991 after confirming he had AIDS in a prepared statement. He passed away from bronchial pneumonia, which was a complication of the disease.
Paul Rodgers replaced Freddie Mercury when Queen toured in 2005 under the name Queen + Paul Rodgers. The tour included dates in Europe, Japan, and the US before the partnership ended in 2009.
The Freddie Mercury Tribute Concert was held on the 20th of April 1992 at London's Wembley Stadium. The event raised over £20,000,000 for AIDS charities and was televised to over 1.2 billion viewers worldwide.