Watch Three Little Pigs for Free: How to Stream the Movie Online at 123Movies. . The two pigs building houses of hay and sticks scoff at their brother, building the brick house. But when the wolf comes around and blows their houses down (after trickery like dressing as a foundling sheep fails), they run to their brother's house. And throughout, they sing the classic song, "Who's Afraid of the Big Bad Wolf?".