A Very Mysterious But Happy Incident

Today during school, a man named Mr Singh told me that I had won some vouchers by the NDP! The vouchers included 15% discount for POPULAR items and more. Gee, I can use up all the vouchers! How did I win it? Anyway, I'm very happy that I have the vouchers. Talking about NDP, the tickets have lesser stock, so there's less chance of winning the tickets, unless you buy them! Happy 43rd birthday, Singapore!