Rod Stewart Hosted the Largest Ever Free Concert Several free concerts have been reported to have an audience of one million (or more), but such numbers tend to be exaggerated. However, according to Guinness World Records, Rod Stewart's 1993 New Year's Eve concert on Copacabana Beach in Rio de Janeiro, Brazil, remains the most-attended free concert that ever took place. An estimated 4.2 million people were in attendance at this performance. The second most-attended free concert was Jean-Michel Jarre's September 6, 1997, performance at the University of Moscow, which reportedly had an estimated audience of 3.5 million