The Inspiration for "Ain't No Mountain High Enough"

For almost 40 years, Valerie Simpson was one half of the soulful songwriting duo Ashford & Simpson. Valerie and her beloved husband, Nick Ashford, wrote songs for legends like Diana Ross, Ray Charles and Whitney Houston. Watch as Valerie tells Oprah the inspiration behind one of their most unforgettable hits, "Ain't No Mountain High Enough."