you're looking sharp!你看上去真精神/真棒/真漂亮【与众不同的表扬！】

you look great today.你今天看上去很棒。【每天都可以用！】

you look nice in that color.你穿那种颜色很好看。

you have a good taste.你很有品位。

You have an eye for beauty 你很有审美眼光

You look stunning.Your dress really goes well with your shoes你看上去魅力惊人.你的衣服也很配你的鞋

You certainly look lovely/pretty in that dress. 你穿那件衣服看起来真是可爱/漂亮

Hey,that's a really nice outfit you have on 你穿的外套真不错!