Jon Alpert and Matthew O’Neil co-direct this combination performance special and documentary, which traces the growing influence of Latin American performers in the United States. It goes all the way back to Desi Arnaz and I Love Lucy, with nods along the way to Jose Feliciano, Cheech Martin and Rita Moreno, but most of the subjects and headliners are of more recent pop-culture vintage, including Marc Anthony and Jennifer Lopez, Gloria Estefan and Pitbull, and Sofia Vergara and Shakira. Jo