Sia and Wiz Khalifa to Perform on 'The Voice'

"Elastic Heart" singer Sia and "See You Again" rapper Wiz Khalifa will perform their songs from film soundtracks next week on The Voice.

Australian singer-songwriter Sia will visit The Voice on April 7 to perform "Elastic Heart." The song is featured on the 2013 soundtrack for The Hunger Games: Catching Fire. It peaked at No.17 on the Billboard Hot 100 chart and has sold 512,000 downloads, according to Billboard. The "Elastic Heart" video has reportedly been viewed more than 213 million times on Youtube.

In an interview with Kristen Wiig for Interview Magazine, Sia shared her thoughts on exploring all aspects of creative arts, like visual arts and the development of her craft.

"Certainly with singing or songwriting, I feel quite confident that I'm skilled at my craft, that I've honed the skills I was given," she told Wiig. "So I could probably use humbling in that department. But when it comes to the visual side of things, which I'm dipping my toe in, I'm definitely appreciative for any f---ing glimmer of validation that I'm actually doing it and that I'm doing it right. "

As for the other guest star on The Voice, Khalifa, will appear on the music competition show on April 8, performing "See You Again," the lead single from Furious 7 of The Fast and The Furious franchise.

The track, recorded with Charlie Puth, has peaked at No. 82 so far on the Hot 100, selling 88,000 downloads, Billboard reported. The film's soundtrack as a whole sits at No. 17 for the second week on the Billboard 200.

The contestants will fight to make it to the playoff round for this Wednesday's episode on April 8. For more information on The Voice and coaches Christina Aguilera, Adam Levine, Pharrell Williams and Blake Shelton, click here.

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Wiz Khalifa, Sia