Singapore's actually really fun for the summery, tropical dresses that fit pretty much everyone - they look especially lovely on pregnant women, I do think, because depending on the cut they try to be roomier and one-size-fits-all, and they can also be obscenely cheap. Try Chinatown, around Albert Centre, or Little India - these areas all have lovely flowy maxi-dresses etc. I swear, when I have my next baby the first thing I'm going to buy is tons of happy, comfy summery dresses to make me feel good about my shape