Madison Nicole Ziegler (born September 30, 2002) is an American actress and dancer. She was initially known for appearing in Lifetime's reality show Dance Moms from 2011 (at age 8) until 2016. From 2014, she gained wider recognition for starring in a series of music videos by Sia, beginning with "Chandelier" and "Elastic Heart", which have in total attracted more than 5 billion views on YouTube. Ziegler has appeared in films, television shows, concerts, advertisements and on magazine covers. Ziegler was a judge on the 2016 season of So You Th…