why is the word "cigarette" in quotation marks? 
btw, what comes into Singapore is subject to GST...
and that which is dutiable which comes into Singapore, is subject
to Customs Duties...
4 things are dutiable in Singapore: Tobacco (and products),
Alcohol, Motor Spirits (which are petroleum, diesel and whatever
runs your vehicles and motors) and Vehicles
if you are found to be evading the duties, you can kena terok terok
by Singapore Customs...
which means that if you order tobacco from overseas, you have to
declare it and pay the taxes.. which makes it not
worthwhile...
btw, big court case in Europe where they have a common market but
different taxes for tobacco.. people are ordering online but the
authorities not happy about it.. i think they're still fighting it
out