The appearance celebrated Van Dyke's 90th birthday this week. Van Dyke was joined by The Vantastix, an a cappella group started by Van Dyke and Mike Mendyke.
The song was written by the Oscar-winning "Mary Poppins" team of Richard and Robert Sherman:
On the same show, the Brian Setzer Orchestra performed the theme music from TV's "The Dick Van Dyke Show":
Van Dyke also shared his surprising diet regimen that keeps him spry in his tenth decade: