After the performances, it was time for the results -- and the revelations of who was behind the masks.
In third place was Crocodile. While Jeong, Scherzinger and Thicke all guessed incorrectly, McCarthy's pick, that of Backstreet Boys singer Nick Carter, was right.
Mushroom was named the runner-up. This time it was McCarthy who was wrong, as was Jeong. However, Scherzinger and Thicke ultimately chose Aloe Blacc -- and they were correct.
Next up was Sun aka Rimes, who was unmasked and declared the winner by host Nick Cannon.
Like Mushroom, only two out of the four panelists -- Scherzinger and McCarthy -- guessed Rimes was the singer under the Sun mask, with Jeong and Thicke settling on Mandy Moore and Katharine McPhee, respectively.
Following her win, Rimes reflected on her time on the show, saying she had a "blast."
"To be the winner, my heart is so open. It was just a beautiful experience," she said. "I wanted to do something that I thought no one else would do. And it felt good to have the audience and the judges and everyone just really feel me and hear me for who I really am."
"I didn't expect this to be this much work, I have to say... It was a blast," she later added.
Meanwhile, former "RHOBH" star Brandi Glanville -- who is the ex-wife of Rimes' husband Eddie Cibrian -- reacted to the news of Rimes' win. In fact, Glanville predicted the Sun was "100 percent" Rimes way back in October.
"I think the sun is 100 percent Leann Rimes #maskedsinger," Glanville tweeted at the time. "Although my kids say no way because she told them that she would never do this show because its [sic] sooo beneath her."
Ahead of the finale, Glanville doubled down on her prediction, writing, "Hope my kids' bonus mom The Sun Leanne Rines [sic] wins the masked singer tonight #Spitfire."
Later Wednesday night, Glanville added another tweet.
"I want to say it but I won't because I'm on NyQuil with a sore throat ...it's not over until the masked lady sings," she quipped.
I think the sun is 100 percent Leann Rimes #maskedsinger although my kids say no way because she told them that she would never do this show because its sooo beneath her