私はこのミュージカルを何度でも観たいって英語でなんて言うの？

"私はこのミュージカルを何度でも観たい" - I want to see this musical multiple times. (少し不自然かもしれません。でも、これが一応直訳です。) - I want to see this musical again and again. again and again か over and over again. - I want to see it as many times as possible. 何度でも観たくなるくらい素晴らしい作品だった。 - It was so amazing, I want to watch it however many times as possible. - The musical was so good it made me want to see it again and again.