"Barcelona" is a single released by Queen vocalist Freddie Mercury and operatic soprano Montserrat Caballé. A part of their collaborative album Barcelona, it also appeared on Queen's Greatest Hits III.

Freddie Mercury was a British singer and songwriter who achieved worldwide fame as the lead vocalist and pianist of the rock band Queen. Regarded as one of the greatest singers in the history of rock music, he was known for his flamboyant stage persona and four-octave vocal range. Mercury defied the conventions of a rock frontman with his theatrical style, influencing the artistic direction of Queen.