You are beautiful. / It's beautiful variations.

あなたはきれい / きれいのいろいろ
とてもきれいだ
めっちゃきれい！
とてもきれいですね
きれいですね
本当にキレですね。

You are very beautiful.
So pretty!
It`s very beautiful, isn't it?
So beautiful right?
It's truly beautiful isn't it?