You would not normally use the noun in the way that you are trying to here
So, you would not say your looks are beautiful, although that is a correct structure - your look is beautiful may also be grammatically correct, but the usage is wrong for the meaning, as appearance is usually looks.
You could say she has beautiful looks, but you would be most unlikely to say you have beautiful looks.
Complimenting somebody - you look beautiful
Talking about somebody who is not directly involved in the conversation
She looks beautiful, just like her mother or
She has beautiful looks, just like her mother
You can use the singular form to mean appearance, but then it would be
she has a beautiful look, but it would be more likely that you would use it to say he has an evil look. To me that would suggest not that he looks evil, but that there is a part of his appearance that suggests that he is an evil person. Similarly he has a saintly look about him.
You need to distinguish between being grammatically correct and normal usage. She has a beautiful look is grammatically correct but it is very unlikely that anybody would use that structure, instead - she looks beautiful. You could say you haveso,
you don't use "look" to describe "you"?
e.g) you have a beautiful looks , your looks is beautiful (? you looks are ?)
only you can use this is:
She has a beautiful look.?
what about "Looks" as noun?
I like your looks.
His looks is very good.
He has very good looks. but