Artists from Brazil and Boston got together at the Emerald Lounge at the Revere Hotel Wednesday to celebrate the ICA’s upcoming “Os Gêmeos” exhibition. (It opens Aug. 1.) “Os Gêmeos” means “the twins” in Portuguese, which makes sense since graffiti artists Otavio and Gustavo Pandolfo are identical twins. The brothers were joined Wednesday by ICA curator Pedro Alonzo, Revere Hotel GM Simon Mais, Rose Kennedy Greenway executive director Nancy Brennan, Gabriela Gazzinelli of the Consulate General of Brazil, and ICA supporters Justin Amaral, Geoff Hargadon, and Lauren Pappas.