Holly Holm, who knocked out Ronda Rousey to become the UFC Bantamweight Champion, attended Saturday night's boxing match between Canelo Alvarez and Miguel Cotto in Las Vegas where she had an awkward encounter with Jay Z and Beyonce.

In an interview with KRQE, Holm revealed she had a "foot-in-her-mouth" moment at a VIP party hosted by the celebrity couple when she asked Beyonce a question she doesn't hear very often.

"I met Jay Z and he says this is my wife and I say... oh hi what is your name? That is what I do when I meet someone's wife. As I am shaking her hand I am thinking why did I just say that," said Holm, according to KRQE.

Holm admitted that she obviously knew who Beyonce was and immediately apologized to the "Single Ladies" singer, who didn't take offense to the question and told the UFC superstar not to worry about it.

"It's Beyoncé.' And Jay Z's asking me about the fight and I can't even focus on what he's saying because I just put my foot in my mouth. And I literally have to interrupt him, I'm like 'I'm really sorry.' And I go back to Beyoncé and I'm like 'Beyoncé, I can't believe I just did that.' She goes 'oh no it's fine,'" she added, according to USA Today.

Watch the interview below: