Mary Esther Wells (May 13, 1943 – July 26, 1992) was an American (United States) singer who defined the emerging sound of Motown in the early sixties. Along with The Miracles, The Temptations, The Supremes, and The Four Tops, Wells was said to have been part of the charge in black music onto radio stations and record shelves of mainstream America "bridging the color lines in music at the time."

With a string of hit singles mainly composed by Smokey Robinson including "Two Lovers (Two Lovers (Mary Wells song))" (1962), the Grammy-nominated (Grammy Award) "You Beat Me to the Punch" (1962) and her signature hit, "My Guy" (1964), she became recognized as "The Queen of Motown" until her departure from the company in 1964, at the height of her popularity. In other circles, shes referred to as the "The First Lady of Motown" and was one of Motowns first singing superstars.