Listen to It Ain't Necessarily So - 1 online. It Ain't Necessarily So - 1 is an English language song and is sung by Lawrence Tibbett. It Ain't Necessarily So - 1, from the album Porgy and Bess: The Broadway Musicals Series (Original Broadway Cast), was released in the year 2009. The duration of the song is 3:00. Download English songs online from JioSaavn.