Beyonce Knowles had the world watching on inauguration night when she performed "At Last" for Barack and Michelle Obama's first dance as president and first lady. Over the past year, Beyonce has sung the famous tune many times — including in front of Etta James — before playing the legend in Cadillac Records. This week at a concert in Seattle, Etta James went off on Beyonce and denounced President Obama for inviting her to sing. James said:

"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 Great Beyonce. I can't stand Beyonce. She has no business up there, singing up there on a big ol' president day, singing my song that I've been singing forever."

Beyonce was asked to perform it and Etta wasn't the first one to make it famous, but she is the most well-known performer of "At Last." Listen to Etta's rant here. When it comes to these two feuding divas whose side are you on — Beyonce's or Etta's?