dlovato082411_08_X17230WM.jpgDemi Lovato is comfortable with her weight ... no matter what people may think.

After receiving criticism about her curvier figure at Sunday's MTV VMA Awards, the 19-year-old Disney starlet, wearing a low cut Mandalay mini, Tweeted:

    "Guess what? I'm healthy and happy, and if you're hating on my weight you obviously aren't."

Lovato checked out of rehab earlier this year after suffering from an eating disorder.

Twilight's Ashley Greeen Tweeted that Lovato was "beautiful" in support of the "Skyscraper" singer.

Lovato responded with the following: "This is why you're my friend. Thank you girl."