Fans rushed to the square after the singer, who had just finished her show in Paris on Wednesday evening (9 December), tweeted:
"Im singing some songs in place de la republique. Meet me there now."

Madonna staged an unexpected concert in the Republique Plaza in Paris on Wednesday night. The plaza has been used as a public memorial for the 130 people killed in the November 13th Paris attacks. (Dec. 10)
Madonna faz show improvisado nas ruas de Paris