Forget the 38 major tennis titles, 22 Grand Slam singles championships and four Olympic gold medals — sometimes, all Serena Williams can remember is that she flubbed a couple of dance steps while performing for Beyonce in concert.

In an interview from today's (November 18) episode of The Ellen Degeneres ShowWilliams tries to explain the pressure of being a part of Bey's Lemonadeon which she famously appears as a "Sorry" feature. She says she felt particular responsibility to do Bey proud during an October Formation Tour stop in New York City, but that stress threw her a little bit off her game.

"It's a lot of pressure because you don't want to mess up," she said. "Bey's so great, she's such a wonderful performer and I've performed tennis-wise in front of thousands of people, but not, like, crowds that huge. So all I could think was 'Serena, don't miss your note, don't miss your note.' And what did I do? I missed my note."

Ultimately, though, Williams found her footing, and wound up having a little bit too good of a time.

"But then I was like 'This is so fun, I don't want to leave!'" she continues. "I was trying to stay out there an extra beat, but eventually they told me in my ear 'Serena, get off the stage!'"

Look Back at PopCrush's Favorite Albums (so far!) of 2016:

More From SoJO 104.9 FM