LOS ANGELES, CA – FEBRUARY 08: Dancer Maddie Ziegler (L) and singer-songwriter Sia attend The 57th Annual GRAMMY Awards at the STAPLES Center on February 8, 2015 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)
LOS ANGELES, CA – FEBRUARY 08: Dancer Maddie Ziegler (L) and singer-songwriter Sia attend The 57th Annual GRAMMY Awards at the STAPLES Center on February 8, 2015 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)
