We all think that the popular movie stars and singers whom we idolise must possess some special formula or be made to go through some terrible weight loss regime just to maintain their svelte figures.    Recently, I did a search of what some of our idols are doing to stay slim and pretty and guess what? The slimming tips which they use are nothing out of the ordinary. In fact, they are so ordinary that we tend to neglect them. Remember, these Asian stars are as human as all of us are.    Shu Qi   This former Category …