If you're in The Curve, go Hairkunst! (03-7710 5585) Ask for Jojo. She's patient in explaining all the different hairstyles that suit you. She even ask what kind of hairstyle you want, and will try to cut to suit your face.

And if you really can afford it, go for Bambang. He has like 7 years experience in Germany or something.

But yeah, call before you go. They usually are packed to the max. Heard there's many celebrities that go there. They have a website too. So search for it on Google.