 Complete the following phrase:  MacNeal had released one solo single  a cover, produced by Hans van Hemert, of I Heard It Through the Grapevine, written by Norman Whitfield and Barrett Strong and made famous by singer Marvin Gaye  before teaming up with Willem Duyn Mouth, to form the duo known as Mouth  MacNeal, recording Pop international hits such as How Do You Do 1971 and Hello-A 1972. She was with Mouth  MacNeal from 1971 to 1974 including a participation in the 