Hi - we did this a couple of years ago on the way back from Australia. I really enjoyed Singapore, it's an incredibly diverse place. Dependant on how long you have, there are lots of things to do. However be aware of the heat, it stopped my husband from doing a lot of the things we wanted to. The minute you walk out the door you start getting all sweaty! We were there 2 and a bit days and managed to explore quite a bit. I found Chinatown brilliant - we even bought a couple of handmade suits for my husband, he was measured up in minutes and the suit delivered the next day! We stayed on Orchard Road in the Phoenix hotel, which was an option with the travel company, we were upgraded to a business suite, with a massage chair and the most humongous bed! We did the gardens, the opera house, the MerLion, a cruise up the river, lots of shopping, a tour on a bus, visited some temples (you must do this, they are absolutely stunning, but remember to respect their traditions by removing shoes.) We had Singapore Slings (but not in Raffles) and found ourselves so exhausted from the heat and walking that the two evenings we just wandered down Orchard Road and found some outside cafe's. I would suggest if you are doing the night safari to do little in the day so you aren't heat exhausted. Definately take a cruise up the river though, the buildings are amazing and you get to see great places to stop off and eat. Have a great time!