Sia reunited with her young pal Maddie Ziegler this week for a performance of "Alive," a single originally written for Adele. "I thought this one was such a smash," Sia told Zane Lowe earlier this year. "But [Adele] just wasn't feeling it."
As she sang the track on Ellen, Sia was concealed in a large, semi-triangular outfit. She also hit The Voice to promote the tune; on that show, she obscured her face with a massive bow tie. Learn more about Ziegler and pop's new child stars.