《It has to be you》的詞曲作者是泰勒·斯威夫特（Taylor Swift）。
歌曲的詞句是：“It has to be you, no other choice, the universe is in alignment. The feeling is deep, it's like a song that you can't get out of your head. It's got a beat you can't ignore, it's got a melody that you can't get out of your heart. It's got a rhythm that you can't resist, it's got a sound that's unmistakable. And I'm standing here in front of you, with every single doubt erased. So it has to be you, I'm waiting for you to say that it's true.”
在歌曲中，歌詞反映了歌曲主人公對某人的深深喜愛，這份感情強烈到讓主人公覺得她的整個世界都已經被這個人占據，以至於她沒有辦法去懷疑自己的感覺。同時，歌詞也表現出主人公對愛情的堅定信念和對美好未來的期待。