Pearl wins 'Masked Singer' - Her identity makes judges' jaws drop

After months of decoding clues, fans of the "Masked Singer" finally knew the identities of the last four contestants.

The singing contest aired the Season 13 finale on May 7 and revealed four celebrities in a juggling plot.

Finally, only one person can take home the Golden Mask Trophy, and the contestant known as the Pearl stands out over her competitors.

In the final moments of the show, Pearl took off her mask and showed up as country singer Gretchen Wilson. Robin Thicke, one of the four celebrity judges in the show, is his only colleague who speculated about the identity of Pearl.

Wilson explained that her "personal, sounding like the tone of others" made him appreciate Thicke after he suspected she was Pearl.

Pearl/Gretchen WilsonMichael Becker/Fox

When the show's host Nick Cannon asked Wilson what inspired her to join the "Masked Singer", she drove about "hard years".

"I was injured. I was in a wheelchair. Sometimes I thought I never came back to this place again. I really worked hard. I really worked hard. I had already worked hard. But, this opportunity really proved that I did nothing," she said.

Early in the episode, Pearl reviews her journey on “The Masked Singer.”

"Every time I put on this pearl outfit, I think it's so weird that I got rid of this obsessed princess," she said in a video interview. "It's different from me. What I'm going to say is that the hoodie and sweatpants are more consistent with who I am. What can I say? I'm tough, raw, unapologetic. I've always been that way."

Who else is the finale of Season 13?

Pearl wasn't the only big unveiling of the night. Mad scientist and Coral's Boogie Woogie also participated in the finale and sang their hearts while fighting for victory.

Finally, "Zombie" star Meg Donnelly is seen as coral. Celebrity Judge Rita Ora correctly guessed her identity and congratulated Donnelly saying she was “really standing” during the game.

"I did this show to get more comfortable on stage and sing. It's something I'm always very nervous and unsafe, it's just my help," Donnelly said in reflection on her decision to join the actor "Masked Singer".

The crazy scientist turned out to be country singer Brian Kelley, a member of the Georgia Line in Florida. Jenny McCarthy Wahlberg correctly guessed his identity.

Kelly said he wanted to "challenge himself" by signing the show.

Boogie Woogie was declared singer Andy Grammer, but no celebrity judge could guess his identity in advance.

"It's incredible to sing so many songs and styles," he said of his experience on the show.