Former Nightwish singer Anette Olzon will be performing songs from “Dark Passion Play” and “Imaginaerum” on a September tour in Brazil. Here’s the dates: 09/17 Rio de Janeiro, BRA – Teatro Clara Nunes 09/19 Recife, BRA – Teatro Boa Vista 09/20 Brasília, BRA – Toinha 09/22 Curitiba, BRA – Tork N’ Roll 09/24 Porto Alegre,…