There’s a new celebrity feud brewing in Hollywood. Etta James is going up against R&B diva Beyonce, the woman who recently immortalized the legendary singer in the big screen production Cadillac Records.

Etta, known for her performance of the classic love song “At Last,” has lashed out at Beyonce for singing the tune during the first dance of President Barack Obama and First Lady Michelle Obama at last month’s Neighborhood Inaugural Ball.

And don’t let the wrinkles fool you. She’ll whip your ass!

“You guys know your president, right? You know the one with the big ears? Wait a minute, he ain’t my president, he might be yours, he ain’t my president. You know that woman he had singing for him, singing my song–she’s going to get her ass whipped,” the 71-year-old quipped at a concert in Seattle last weekend.

“The great Beyonce. I can’t stand Beyonce,” she spat. “She has no business up there, singing up there on a big ol’ president day, singing my song that I’ve been singing forever.”

Listen To Etta James Threaten To Rub Off Beyonce’s Lacefront