Watch Sun move everyone to tears in best performance in 'Masked Singer' history

The contestant brought down the house with her stirring cover of Billie Eilish's "When the Party's Over."

Credit: Michael Becker/FOX

Sun has treated us to some great shows this season, from her showstopping cover of Lizzo's "Cuz I Love You" to nailing Kesha's emotional song "Praying." But to take a page from the dramatic panelists, we think the star just delivered the most beautiful performance in the history of The Masked Singer.

On Wednesday's semi-finals, Sun made the bold choice to sing Billie Eilish's melancholic "When the Party's Over" a cappella style to show off her incomparable pipes, before subtle instrumentals joined in at the end. It was a risky move that a lesser singer couldn't have pulled off — especially those high notes — but Sun proved she wasn't only a fantastic vocalist, but also a seasoned performer who knows how to put on a damn show. The bare stage decoration and rain effects only added to the haunting, emotional atmosphere, without distracting us from her pure talent.

And we weren't the only ones who thought it was incredible. All the panelists gave Sun a standing ovation, except guest Craig Robinson, who sat in his chair in disbelief over the incredible performance.

"All my life I've felt the heat of the sun, I had never heard the voice of the sun until now," an emotional Robinson said.

He wasn't alone. All the panelists looked visibly moved. Jenny McCarthy stood up on her chair, which somehow made her look shorter, and Nicole Scherzinger ended up in full tears.

We make fun of the Pussycat Doll singer a lot for crying every show (a feat only rivaled by The Real Housewives of Potomac's Candiace Dillard Bassett), but we feel her this time.

"You have such a gift. Just listening to you, all I could do is just exhale and breathe," Scherzinger told Sun. "I could listen to you forever. You have a voice of the heavens. That was flawless, you are flawless."

Scherzinger was also on the same page with EW when it comes to the celebrity under Sun's costume. The panelist picked up on the blue wings and blue butterflies from the contestant's clue packages, leading her to guess it is LeAnn Rimes, who shot to fame at age 13 with the song "Blue."

Things got a little difficult because of Sun's onstage clue about meeting Scherzinger once in the bathroom, as the judge said it fits for both Rimes and her other prediction, Brandi Carlile.

"I actually think I've met both of them in the bathroom," Scherzinger said, laughing. "That's where girls bond."

After defeating Popcorn in the semi-finals, Sun will finally reveal her identity on Dec. 16's two-hour finale, when we'll also find out if she, Mushroom, or Crocodile wins season 4's Golden Mask Trophy.

Related content:

Who is Sun on The Masked Singer? All the clues it's this Grammy-winning country icon
The best performances from The Masked Singer season 4
The Masked Singer: The complete list of clues for every season 4 contestant

This story originally appeared on: EW - Author:Rachel Yang