Brothers Fradique and Antonio Mendes Ferreira were born in São Tomé and Príncipe, a country that you might forget exists. The island nation is comprised of two achipelagos off the coast of Gabon; it’s the second smallest country in Africa and the smallest of all the Portuguese speaking nations. (Its population isn’t that much bigger than the population of Providence.) There, you learned something today. Anyway, the Santomean duo are heading to Fete for their first ever show in the United States. They’ve scored some big hits in Portugal with a Portuguese/criolu combo of kizomba and swoony high drama pop ballads. Tickets are pricy but this could be a once in a lifetime thing.