The American songwriting and production duo Nickolas Ashford and Valerie Simpson were a powerhouse of R&B, soul, and pop music from the late 1960s onward. Their prolific career at Motown and beyond yielded numerous hits for artists like Marvin Gaye and Diana Ross, establishing them as iconic figures in popular music. They also enjoyed a successful performing career as Ashford & Simpson, further cementing their legacy as versatile and influential artists.