As I remember it, from probably the very early 60's:

The height of a piggy's ambition, From the day he is born, He hopes that he'll be good enough, To be a Frosty Morn.

So... everybody join in and

Sing it over and over and over again, Frosty Morn. Sing it over and you'll sing it over again, Frosty Morn.

Sure miss those "little dancing piggies"!