Qualifying in on Saturday - 21 September 2013 and Raceday is on Sunday - 22 September 2013.
The Singapore circuit is named a street circuit, similar to Monaco. Outright horsepower is not a real advantage unlike purposely built F1 circuit like the Sepang F1 circuit which has 2 long straights.
If it rains, the race becomes totally unpredictable.
Last year's top 3 were:
1. Vettel
2. Button
3. Alonso