Princess Diana's mother has helped launch a song for a charity she thinks her late daughter would have supported. Frances Shand Kydd made a rare public appearance Wednesday in London at the launch of "Will You Walk On By?" sung by former Runrig lead singer Donnie Munro. The lyrics encourage listeners to love their neighbors and consider those less fortunate. Proceeds from sales of the single will go to the Pilgrimage Trust, a charity which provides holidays for disabled children. "The first moment I heard it, I knew it was special," Mrs. Shand Kydd says in a message on the record sleeve. "It captured all the concerns both Diana and I cared about."

Additional reporting by Donna Freydkin.