YOU SAID:
All I want for Christmas is youuuuu
INTO JAPANESE
クリスマスに欲しいのはyouuuuuだけ
BACK INTO ENGLISH
All you want for Christmas is youuuuu
INTO JAPANESE
クリスマスに欲しいのはyouuuuuだけです
BACK INTO ENGLISH
All you want for Christmas is youuuuu
That didn't even make that much sense in English.