Far East Plaza, Takishimaya (Kinokuinya) - Orchad Road
Suntec City, China Square (esp on Sunday when they have flee markets)
Sunshine Plaza (anime dvds, animes screening, plastic models, anime related merchadise)
The above are places you can visit to find some anime related stuffs, dvds, books, illustration book, manga, and also dirt cheap toys.
For more infomation, visit my mutiply where i have an article written on my lastest visit to Singapore.
http://kanzaki84.multiply.com