A Lady Gaga impersonator was mistaken for the real Mother Monster at a charity event in Las Vegas on Friday, October 25, 2019. Attendees at the national conference for Women of Global Change were definitely not expecting what was in store for them that evening.

The pop superstar dominated the state in a pink pantsuit and matching wide-brim hat. Typical Lady Gaga attire. She sat at a grand piano and performed some of her biggest hits like “You and I” and “Million Reasons.”

But the performer was actually Tierney Allen, a Lady Gaga impersonator who performs regularly in Legends in Concert, a tribute concert which also features Freddie Mercury lookalikes.

Allen told The Hollywood Reporter that she has no intention of misleading the audience into thinking she was the real Gaga.

“What happened is I was booked to perform at a private event for Women of Global Change. We always tell the clients to make sure the guests know I’m not the real thing,” Allen says.

So why all the confusion? The event host, Aurea McGarry, told the audience that Allen was, in fact, the real Gaga. “I thought, ‘Oh, that’s not good,'” recalls Allen. “I immediately started sweating. I must have looked like a deer in the headlights.”

To clear it all up, that was certainly not the real Lady Gaga.