Which One of These Stars is Really Sia?
Kiernan Shipka
Child actress Kiernan Shipka could easily be playing hide and go seek as Sia.
— LOS ANGELES, CA - JANUARY 23: Actress Kiernan Shipka arrives at the 16th Annual Screen Actors Guild Awards held at the Shrine Auditorium on January 23, 2010 in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images) *** Local Caption *** Kiernan Shipka