Answer the following Q with stream of consciousness. Context: "You're Going to Lose That Girl" is a song by the Beatles from the album and film Help!, written by John Lennon and Paul McCartney. Capitol Records originally titled the song "You're Gonna Lose That Girl" in the United States.

Question: who wrote you're going to lose that girl?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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To answer this question, we should know that: "You're Going to Lose That Girl" is a song by the Beatles from the album and film Help!, written by John Lennon and Paul McCartney. Therefore, the final answer is John Lennon and Paul McCartney.