anything involving "quick" weight loss will probably involve a big dose of water weight loss. which will just come back as soon as you start dieting properly.
that said, i'd suggest eating a low calorie diet (1200-1400 calories) and getting in some intense cardio every day.
BUT, since you are already at a healthy weight for your height, it will probably be slow no matter what. appearance-wise, you may want to focus on toning up instead of the number on the scale