Singapore Passport expiry in September

Good Morning,

I am visiting Hong Kong in March 2013 but my passport is expiring in September 2013. I am earger to book a flight now so am thinking to process the re-newing my passport after i return from Hong Kong.
Would like to enquire am i allow to visit Hong Kong for 1 week if i only have 6 months to expire?

Kindly advise,
Thanks =)