After facing a barrage of “fat” jibes following her disastrous performance at the 2007 MTV Video Music Awards, Britney Spears managed to dance her waistline lean once again, but the pop queen has found herself struggling to deal with criticism about her weight following a recent wave of public jokes about her figure.

Britney is reportedly “devastated” by causatic comment made about her frame since the lauch of her Circus World Tour earlier this month.

A Heat snitch says: “Britney has been upset by some of the negative feedback she’s been getting. She’s worked so hard on her figure and her fitness.”

Britney’s been especially hurt by slick monikers, like “Bulky Spears” and “Jelly Belly,” says the insider. Of course, this spy never states exactly who’s responsible blasting Brit’s weight.

According to the tab, Britney has adopted a diet regime that includes downing Hoodia shakes, which include an African tree bark believed to prompt weight loss.

“She thought she was an unstoppable force, but now it’s dawning on her that she’s not as revered as she once was, which is causing her upset. She feels she’s put a heck of a lot of effort into the tour. It’s devastating for her to hear the criticisms. We just hope she doesn’t take it too much to heart.”