Try Mosche Salon at Grand Hyatt Hotel. My stylist is Rose Sia, and the ceramic perm she does for me is so good that my friends call me the walking Barbie Doll.
There're some really interesting house parties hosted in condos around Singapore, have you been to any? They're really fun if you're looking for interesting cult brands. I know couragemyloveonline.com and tsky.com hosts them once in a while.
Is that a brandname? There're some interesting house sample sales in Singapore which may stock some interesting US brands. I go house parties whenever I get an invitation in Singapore and often find really good stuff.