Dick Van Dyke's chimney-sweep dance is one of the most memorable parts ... It surprised everybody, but nobody was as surprised as I was. We did several takes of it, and I was just amazed.

Directed by Spike Jonze and Mary Wigmore, the seven-minute video features Van Dyke dancing barefoot in a suit ... at present and unlike his father, he did not have a fulfilling career in Hollywood.

"My grandkids call her Grandma," Van Dyke said. "My four kids just love her." One of the things that bonded the couple is their mutual love of singing and dancing, which has lasted throughout ...