[Image via FameFlynetpictures.]
Oh Gurl, you better give our hearts a break because you're going to give us heart attacks with those vocals!!!
Is it just us or does she get more fierce with each performance?!
Even if she might've stumbled a bit on the lyrics, she brushed it off like a true professional!!!
Ch-ch-check out the AHmazing Demi work the crowd (above)!!!