I'm a true believer in having the ability to laugh at yourself so why is Gwen Stefani getting so much backlash for calling her younger self chunky?

Gwen Stefani posted a picture on twitter of herself from 1983 getting an autograph from Sting, in the tweet she referred too her younger self as being "chunky" officially saying "chunky me in 1983" (hey that rhymes) but because of this comment about herself and her past look of image the twitter world turned on her saying many females look up to her, she shouldn't be referring to her old self in such a negative way but why do I feel these people are acting a little dramatic, shouldn't we be able to poke fun at ourselves, isn't that the best way to build your inner self esteem.