It might come off slowly after the first couple of weeks. Regardless of your starting weight, week 1 is normally a great loss, it's after that it can be slow. I'm sure you can lose 20lbs by Easter if you really stick to it 100%. The only downside to Atkins is that it isn't a very forgiving diet to cheat on, when you cheat it can set you back a fair bit, you have to be 100%.