Western food? (Singapore)

Hi There,
I am coming out to Singapore with my family at the end of this year. Although I love the local food I think I will have a need for some familiarity, at least at the beginning, for me and my family, and a large part of everyday life is around food.

So I wanted to know if anyone can let me know how easy it is to get hold of typical western food and if so how much it costs? Are there any western supermarkets in Singapore?

Many thanks
Roger