Ellen DeGeneres and Heidi Klum Perform as Sia and Maddie Ziegler for Halloween

Sia is proving to be one of this year's most popular Halloween costumes.

Days after Kelly Clarkson performed an a capella rendition of the singer's No. 1 hit "Chandelier" in a Facebook Live video, Ellen DeGeneres decided to dress up as the wigged wonder for her talk show's Halloween episode. Mimicking the pop star's look on Monday, DeGeneres said, "Happy Halloween, everybody! As you can tell, I'm Sia, and the problem is I can't really see ya."

"I made this costume myself. I found some old loofahs backstage. It was not that hard to make," the comedienne continued. "And then the bow is from I gave away a car, recently. Sia and I have a whole lot in common. She's Australian, and I married an Australian, and we both like to swing from a chandelier—which is why I'm no longer welcome at Bed Bath & Beyond."

DeGeneres then introduced Heidi Klum, dressed as dancer Maddie Ziegler. "I love you for doing this," she said. The Project Runway host grinned and told her pal, "I would do anything for you."

Klum had no qualms about wearing a nude leotard, as Ziegler does when she dances with Sia. "Not too many people could pull that off, but you look fantastic. You really do," the host said. "You look fantastic." Once she confirmed Klum had "stretched," it was time to take the stage. "It seems weird that we would be like this and we wouldn't perform, so we should probably perform right now," she said. "We rehearsed for over seven minutes, so this should be good."

Before "Chandelier" began, an exuberant Klum said, "Let's just go for it!"

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Stars Celebrate Halloween 2016

But the performance took its toll on the German-American supermodel.

"Go sit in an ice bath," DeGeneres told her. "She's in pain, and I can't see."

Sia didn't actually appear in The Ellen DeGeneres Show's Oct. 31 episode, but two other musicians did: Ariana Grande toured a haunted house, and Chris Martin hid in the audience.