What should I wear to attend his wedding party?

我应该穿什么衣服去参加他的婚礼呢？

If you are a guy, you should wear a nice suit or tuxedo. If you are a girl, wear a nice dress or gown.

(Western-style) clothes

我应该穿什么出席今天的婚礼！

If I were u , i would prefer to wear a beautiful dress,and have a wonderful make-up to attend his wedding in order to show him that I can live better without you.

Prada,Gucci,Jimy Choo....