When ABC's Extreme Makeover: Home Edition set out to build a new house for the showtune loving Lutz family, Ty Pennington sought the help of a true Broadway star: Promises, Promises' Kristin Chenoweth. Eager to help out, the Tony-winning actress strapped on her hard hat to help the construction crew build a dream home for the family (which consists of six adopted children with Down syndrome) and taught them the importance of whistling while you work. Not surprisingly, the star added a Broadway twist to the demoliton process by breaking into song, complete with jazz hands. Check out Kristin getting to work below!