Mack the Knife Singer is a term used to refer to two iconic singers, Bobby Darin and Ella Fitzgerald. Bobby Darin was an American singer, songwriter, multi-instrumentalist, and actor who released the hit single 'Mack the Knife' in 1959. Ella Fitzgerald was an American jazz singer and songwriter who released her version of 'Mack the Knife' in 1960. Both versions of the song were hugely successful and remain popular today.