I wonder how Ke$ha lost all the weight. Beer and whisky diet, maybe? That can't be good. I wouldn't count her as a fine example but the girl does look a lot better after losing the college chub.
I looked at my photo album from 2 years ago and compared a picture from before to a most recent photo of myself and I can still remember struggling to get to where I'm at now. I looked pretty happy back then but in all honesty, I was depressed and extremely self-conscious about my body. It was the depression and insecurity that led to further binge-eating. I treated my body like trash, feeding it with junk food and unhealthy food, even at ungodly hours. I was happy in general, but I wasn't happy with myself.
I'm so over the 'fat phase' now and I've never been more grateful to find that strength within to do something for myself and make it last!
Do it for you.