Heart Attack is an incredibly hard song to sing live. You only have to listen to the record to comprehend how hard it would be to hit such notes, but Demi hit them. A flawless vocal performance with fast pace as well as ambitious notes is almost unheard of amongst today's artists, Demi's performance is the closest we're going to get. As for people questioning her career longevity, she's a huge star in the USA having scored four consecutive #1 albums, and is up there with the biggest stars in America. Fat? Are you being genuinely serious? Girl's shouldn't have to be stick thin. Demi is the perfect weight and she looked beautiful. She's been through a great deal regarding her self confidence and she's a role model to girls that you don't have to stick thin to look good. She's not fat, not chubby, just healthy. If you're branding healthy as being 'fat' then I'm sorry, but you're mistaken.
Before you people continue to criticise Demi's voice, please take yourself over to YouTube and take some time to listen to some of her performances which may I add, are performed live. Also, listen to a couple of tracks from the new album 'DEMI' and you'll see that compared to most artists around today, she is a credible artist who doesn't just produce generic pop songs. The album went to #1 in over 50 countries in little time, now try and argue her star power.