Esperanza Spalding and Gretchen Parlato are two of the dopest young singers out right now. Esperanza is the only jazz artist ever to win the Best New Artist Grammy award, and Gretchen is a very experienced vocalist, working steadily since 1994 and having released three albums of her own. This is one of the most relaxing songs I’ve ever heard. It’s exceedingly simple, featuring only the pair-s voices, Esperanza’s bass, and Gretchen’s soft clapping. It’s a cover of a song from the 1960s written by Antonio Carlos Jobim, best known as the composer of “The Girl from Ipanema,” and it appears on Esperanza’s 2010 album Chamber Music Society. It’s supposed to be 90° in NYC tomorrow, so play this as you sit in a lawn chair (or more likely on a stoop) drinking a cold liquid and eating some type of fruit (preferably a guava or something tropical).