YOU SAID:
She's got you mesmerised while I die.
INTO JAPANESE
彼女は私が死ぬ間、あなたを魅了しました。
BACK INTO ENGLISH
She charmed you while I was dying.
INTO JAPANESE
私が死にかけている間、彼女はあなたを魅了しました。
BACK INTO ENGLISH
She charmed you while I was dying.
That didn't even make that much sense in English.