“发型很棒”英文怎么说？

(Your)Hairstyle is so great/cool!
Your hair style is amazing!

发型：hairstyle
很棒、很酷，老美口语great/cool

nice do.
比较口语化的说法，hairstyle 算比较正式的说法。

Your hair looks so cool!

Your hair looks so nice!

Your new hairstyle looks good.

nice hairstyle，我都是这么说的