In an emotional new interview with CBS This Morning, Stevie Wonder reflected on the passing of his friend Aretha Franklin.

Early on, Wonder gets choked up talking about Franklin, saying, “I thought I cried my last tear.”

Later, he adds, “She did incredible music, incredible singer. She touched every genre. Every singer was influenced in some way by the way she sang, and they will forever be influenced by her because of her voice, her emotion, her sincerity is unforgettable.”

He also ranks the greatness of Franklin’s voice with those of Dr. Martin Luther King and John Lennon. “She was consistently a great human being… She believed, I think that most of all she was doing God’s work, and she was. She brought joy to others’ lives, and she will – her voice and the essence of her will long [outlive] all of us that are here right now,” he explains.

Watch the full interview below: