"Água de Beber".
OK, boys and girls, back to the 50s: It was 1959 and Brasilia, the new federal capital of Brazil, was being built in the Brazilian Highlands away from the overpopulated coast. Then President Juscelino Kubitschek invited composers Antônio Carlos Jobim and Vinícius de Moraes to spend some time in the building site and write an anthem to be performed at the new city's inauguration. One night, the two of them were walking and heard the sound of water. They asked the watchman where the sound was coming from. He replied, "Don't you know? This is where you have drinking water, buddy boy" (translated from Portuguese). That was their inspiration for a classic 1963 bossa nova/jazz standard first recorded by Jobim himself. Covered by, among many others, Astrud Gilberto, Frank Sinatra, Sergio Mendes and Brasil '66, Charlie Byrd and Ella Fitzgerald. Song? Answer: "Água de Beber". The watchman replied, "Você não sabe não? É aqui que tem água de beber, ...