As the larger-than-life frontman for Queen, Freddie Mercury conquered the world in the 70s, and Queen was still going strong when Mercury released his first solo album, Mr. Bad Guy, in 1985, though he had recorded the song Love Kills with producer Giorgio Moroder for the Metropolis soundtrack the year before. While Mr. Bad Guy was a danceable pop album not dissimilar to some of the work Mercury had done with Queen in the 80s, 1988’s Barcelona was an unconventional pop/opera crossover project recorded in collaboration with Spanish soprano Montserrat Caballe. This operatic venture was notably performed at the Avinguda De Maria Cristina Stadium in Barcelona. By this time, Mercury had been diagnosed with HIV, but his condition was not revealed to the public. He made two more albums with Queen, and did not make his illness public until just one day before his death on 24th November 1991. Known as the Freddie Mercury Aids Benefit, a major concert took place in Wembley Stadium in April 1992, commanding, when televised live, the largest ever worldwide viewing audience.