The capital of Singapore is Singapore. Though it sounds funny its true! Just like Luxembourg having Luxembourg as capital and San Marino having San Marino as capital etc.
Singapore is a small, heavily urbanised, island city-state in Southeast Asia. There is actually no capital city. The major regions in Singapore are the Orchard area which is a shopping paradise. The financial district is around Shenton Way. The most popular tourist attraction beside shopping is Sentosa Island. A tiny island which has been tranformed to a tropical paradise. At the moment, the government has started on creating Las Vegas style of casinoes in Sentosa and Marina to attract more tourists.
I don't know what is the capital of singapore