Queen's twenty-one minute performance, which began at 6:41 pm, was voted the greatest live performance in the history of rock in a 2005 industry poll of more than 60 artists, journalists and music industry executives. Queen's lead singer Freddie Mercury at times led the crowd in unison refrains, and his sustained note—"Aaaaaay-o"—during the a cappella section came to be known as "The Note Heard Round the World". The band's six-song set opened with a shortened version of "Bohemian Rhapsody" and closed with "We Are the Champions". Mercury and fellow band member Brian May later sang the first song of the three-part Wembley event finale, "Is This the World We Created...?"