原聲由 Stephen Trask 作曲。
在經歷了多次的約會后，佐伊(詹妮弗·洛佩茲飾演)認為遇到一個合適的人要花太長時間了，而她自己又很想當上一名母親，于是她決定實行人工受精的計劃，但此時，她遇到了各方面非常適合自己的斯坦（艾歷克斯·奧洛林 飾演）。她該如何在懷孕的同時與斯坦戀愛呢？
如果你喜歡The Back-Up Plan的專輯《電影原聲 - The Back-Up Plan(Score)(剩女也瘋狂/后備計劃)》里的歌曲，可以把下面的歌曲連接發給你的朋友:
1.Daydream - The Back-Up Plan
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2.The Back Up Plan - The Back-Up Plan
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3.Now What? - The Back-Up Plan
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4.That Guy - The Back-Up Plan
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5.Show Me Your Cheese - The Back-Up Plan
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6.Goodbye For Now - The Back-Up Plan
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7.Another Penny Drops - The Back-Up Plan
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8.Pregnancy Test - The Back-Up Plan
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9.Community Garden - The Back-Up Plan
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10.A Serious Question - The Back-Up Plan
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11.Fire - The Back-Up Plan
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12.First Kiss - The Back-Up Plan
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13.Test Results - The Back-Up Plan
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14.Shadybrook - The Back-Up Plan
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15.Mirror, Mirror - The Back-Up Plan
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16.Yummy, Yummy - The Back-Up Plan
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17.Cheese Muse - The Back-Up Plan
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18.Orgasm - The Back-Up Plan
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19.Telling The Truth - The Back-Up Plan
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20.Not Leaving Leaving - The Back-Up Plan
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21.Dejected - The Back-Up Plan
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22.Here We Go - The Back-Up Plan
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23.Studies - The Back-Up Plan
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24.Chicken In Your Hair - The Back-Up Plan
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25.Pancake Prelude - The Back-Up Plan
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26.Are You Still In There? - The Back-Up Plan
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27.Wall of Strollers/Examination - The Back-Up Plan
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28.Pictures of Mom - The Back-Up Plan
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29.Just Go - The Back-Up Plan
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30.I Wanted A Baby - The Back-Up Plan
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31.Old Dogs-New Tricks - The Back-Up Plan
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32.Baby Time - The Back-Up Plan
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33.And Now, For The Exciting Conclusion Of - The Back-Up Plan
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34.Proposal - The Back-Up Plan
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