I've gone to Wal-Mart in Suntec City 2 years ago. It likes a supermarket. I've bought Pierre Cardine's bra set there. It's cheaper than Hong Kong's Jusco. You can also buy some educational CD/VCD sets there, just like mother goose, pre-school power. It's cheaper than HK. I've also bought a Combi BB car cost around $300 somthing though it's is made in Combi in China.
actually most of the stuff is more expensive than HK. private hospital investigations are cheaper than HK, better service.
For shopping: buy the local singapore stuff la (which you can't find in HK) eg.:
林志源肉干
Kaya jam
Charles and Keith sandals
more english books to choose from in Popular Kokon Tozai <-- click
Haianese chicken rice sauce, Laksa sauce etc (from local supermarket)
Supermarket in Suntec City is not Wal-mart, it's Carrefour.
Actually Singapore has a lot of 野抵買 but most of them are local hawker food and you cannot bring back to HK!! Eat there la.