Demi Lovato has always been vocal about the media’s perception of how everyone should look and now she’s slamming tabloid Star magazine. The mag claimed that Duchess of Cambridge Kate Middleton is pregnant due to her “expanding waistline.” Cue Demi’s Twitter rant!

“So apparently Kate Middleton (William?) is pregnant because of THIS picture… Are you KIDDING ME?!!” she tweeted and included a photo from Star’s cover page.

Related Article: Demi Lovato Reveals Her Biggest Fear Going Into Rehab!

“And people wonder why girls/guys have body image issues,” Demi continued. “Whether she is or not, she still has a beautiful body. Shame on you Star magazine.”

Kate’s been on “bump watch” pretty much since her and Prince William tied the knot back in April 2011, but it’s gotten worse after talking about future kids yesterday in the South Pacific. And the media went nuts when Kate turned down a glass of wine for water at a state banquet dinner in Singapore. Basically the equation goes like this: turned down alcohol = pregnant.

What do you think about Demi defending Kate to the media? Should she just stay out of it or is she right? Sound off in the comments below!

Photos Courtesy of Fame FlyNet