Christina Aguilera surprises the 'RuPaul's Drag Race' queens

On the season premiere of RuPaul's Drag Race , the contestants were all on their toes when RuPaul announced the return of season nine's drag queen Farrah Moan.

But the reveal was actually a joke! The actual queen who entered the stage was none other than pop icon Christina Aguilera, this season's first guest judge. And just in case anyone in the room still needed proof that it really was her, the pop singer belted out a few notes, because NBD.

RuPaul joking that Aguilera was drag queen Farrah Moan was likely to poke fun at an incident that happened last year, when a fashion blog mistaked Farrah's look at DragCon for Aguilera arriving at the Met Gala.

With the jokes out of the way, once the queens managed to regain their composure, Aguilera joined the judges' panel, where she had the best time watching the bottom two contestants lip sync battle each other to her hit song "Ain't No Other Man."

And, later, on the Untucked aftershow, we got to see a behind-the-scenes moment between Aguilera and the ladies, where the girl talk got real. During the conversation, in which one contestant mentioned that Aguilera's hit song, "Fighter," was the first song she ever did drag for, another contestant asked Aguilera, "So, was that about someone?" The singer exclaimed, "Of course it was!" Aguilera also said that the guy "deserved it," and revealed that "Infatuation" was about a guy who she found out was gay. "It was heartbreaking because I found out he played for your team, not mine!"