Livvy - throughout my entire childhood / teenage years and adulthood I had always been on the chubby side. At the end of my 2nd pregnancy I was 92kgs (previously my weight had probably been around 65 - 67 kgs - I'm 162cms by the way). I felt yucky and hated my reflection. So in late September 2009 I started exercising vigorously daily and counting my calories. By early March 2010 I weight 59kgs - the lightest I had ever been in adulthood. Then by mid April I weighed 55kgs and maintained that until I became pregnant with my 3rd baby. So I know that it IS possible to totally change the shape of your body.
I have a link to my blog in my signature, and I also have a FB page called 'Fat Chic Slim' where I try to help others keep on the straight and narrow and offer some 'tough love'. I'm generally pretty hard and fast (maybe abrupt) with my advice (I am a qualified / registered Personal Trainer and Fitness Instructor fyi), so if people want my honest advice they will get it - and possibly squirm lol, but it has helped others.