The sleigh bells are jingling, the snowflakes are falling, and the jaw-dropping holiday-themed challenge has begun as four teams compete to win $10,000 for a charity. Returning fan-favorites pair up with celebrity builders Sophia Bush, Holly Robinson Peete, Eric McCormack and Lil Rel Howery for a two-night competition. The teams go head-to-head and craft an epic reindeer-replacement-build that puts a twist on Santa's sleigh