Citizens of Western Europe, the USA and Commonwealth countries don't need a visa to enter Singapore. Check with the relevant embassy before departure
. Unless you specify how long you intend staying, you'll normally be stamped in for fourteen days .
Entering from anywhere other than Malaysia (with which there are no duty-free restrictions), you can bring in 1 litre each of spirits, wine and beer duty-free; duty is payable on all tobacco. Other duty-free goods in Singapore include electronic and electrical items, cosmetics, cameras, clocks, watches, jewellery, and precious stones and metals.
Extending your visa for up to three months is possible, at the discretion of the Singapore Immigration and Registration Department (Mon-Fri 9am-5pm; tel 3916100). Extensions beyond three months are less common, but there's always the option of taking a bus up to Johor Bahru, across the border in Malaysia, and then coming back in again.