http://rockinrio.com/rio/pt-BR/novidades/maroon-5-substitui-lady-gaga-nesta-sexta-feira-15-no-palco-mundo Due to severe pain she's cancelling Rock in Rio, Maroon 5 will perform in her stead According to the statement they are offering people who have tickets but don't go tomorrow a refund, more info on Monday the 18th. If you enter the festival terrain tomorrow you will lose your right for the refund