If, previously, she was talking about being full-figured and fabulous and lovin' herself and then, after her weight loss, she admitted to being very unhappy with herself, perhaps it just means she's human like the rest of us.
I wonder if, like many people, she felt (justifiably so) that being severely obese causes people to judge you unfairly. Not wanting to be seen as the bitter, low-self esteemed fat person causes many people to be the outgoing, sassy, life-of-the-party, "livin'-large-and-lovin'-it" fat person who everyone loves to be around. If they're bowled over by your force of personality, glitz and glamour, then they won't dismiss you out of hand, or pity you as a poor, fat, lazy slob. Nobody wants to be pitied.