Oh say can you see! Demi Lovato sings the National Anthem in VERY low-cut white dress at McGregor vs Mayweather fight in Sin City

She expressed her excitement over opening the ‘fight of the generation.’

And on Saturday night in Las Vegas, Demi Lovato set the tone for the face off between Connor McGregor and Floyd Mayweather with a stunning rendition of the National Anthem.

The Sorry Not Sorry singer beamed as she made her way to the center of the boxing ring in a low cut white cape dress.