At Live Aid, held at Wembley on 13 July 1985, in front of the biggest-ever TV audience of 1.9 billion, Queen performed some of their greatest hits, during which the sold-out stadium audience of 72,000 people clapped, sang, and swayed in unison. The show's organisers, Bob Geldof and Midge Ure, other musicians such as Elton John, Cliff Richard and Dave Grohl, and music journalists writing for the BBC, CNN, Rolling Stone, MTV, The Telegraph among others, stated that Queen stole the show. An industry poll in 2005 ranked it the greatest rock performance of all time. Mercury's powerful, sustained note during the a cappella section came to be known as "The Note Heard Round the World".

What date was Live Aid?