Demi Lovato at MTV VMAs 2011: 'I've gained weight. Get over it.'

demi-lovato-vma-gi.jpgDemi Lovato looked happy and beautiful at the MTV VMAs on Sunday night. The former Disney star was in the house to present the award for Best Collaboration to Kanye West and Katy Perry.

Lovato, whose latest album "Unbroken" hits shelves on Sept. 20, reunited with bestie Selena Gomez on the red carpet, and the friends -- who are clearly over their falling-out -- squealed over Lovato's collaboration with Missy Elliot on the record.

Unfortunately, it seemed that Lovato's Twitter feed that night wasn't too positive. After taking the stage with Chord Overstreet to present, she felt compelled to address some comments on her Twitter.

"I've gained weight.Get over it.That's what happens when you get out of treatment for AN EATING DISORDER," she tweeted. She later removed the tweet, though she remained a trending topic (mis-spelled!) for a while after.

You tell 'em, Demi!

EDIT: Demi replaced her earlier tweet with the following: "Guess what, I'm healthy and happy, and if you're hating on my weight you obviously aren't. :) #UNBROKEN." She also dropped the following response to a "fan."
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