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Before embarking on her solo career in 1970, Diana got her start with Motown as a member of the Supremes, alongside Mary Wilson and Florence Ballard. The Supremes rose to fame with several hit songs, including "Baby Love," "Stop! In the Name of Love" and "Where Did Our Love Go."
Look back at Diana's career, from Motown to Hollywood.
In those days, Diana says she had no idea what impact she and the Supremes were making and how they were influencing young girls across the nation. "We didn't really know what to do except to try to be the best we knew how to [be]," she says. "I don't think we felt like we were stars."
"When did you think you'd made it'?" Oprah asks.
"Never!" Diana laughs. "I've never been that overconfident about what's possible. ... When did you think you had made it?"
"I think sitting here with you has made me make it," Oprah jokes.