Someday（I Will Understand）由流行天后Britney Spears录制演唱，这首歌由布兰妮独自创作完成，并且和Guy Sigsworth一起完成了这首歌的制作。这首歌的mv只使用了黑白两色，其中Britney是一名孕妇，并刻画她性格的转变。
附上中文歌词：
Nothing seems to be the way that it used to
世间万物总是让人出乎意料
Everything seems shallow,God give me truth
而上帝让我看清了真实的一切
In me and tell me
我告诉我自己
Somebody's watching over me
他正默默守护着我
And that is all I am praying is that...
守护着我虔诚的祷告...
Someday I will understand
将来我会领悟到
In God's whole plan
在上帝的安排下
And what he's done to me
我经历了美好的人生
Oh but may be
又或许
Someday I will breathe
我能自己感觉到生命的气息
And I'll finally see
因为我会亲眼看到
See it all in my baby
我们爱情的结晶
Don't you run too fast my dear
你走得如此地匆忙
Why don't you stop
为什么不留下？
Stop and listen to your tears
听听你哭泣的灵魂
Their all you've got
你所体会的真情
It's in you
全都深藏在你心里
You see somebody's watching over you
你知道我正守护着你
And that is all I am praying is that...
祈祷着你降临我的生命里...
Someday you will underst and
到了那天,你会明白的
In God's whole plan
这是上帝的安排
And what he does to you
让你来到了世间
Oh but baby,someday you will breathe
孩子,你会呼吸到万物的气息
And you'll finally see
你也终将亲身感受
See it all in your baby
你所得到的回报
See it all in your baby
就是爱的新生
No moment will be more true
这是最真切的时刻
Than the moment I look at you
当我注视着最爱的你
It's in you
看着你自己
You see somebody is watching over you
你知道上帝和我一起守护着你
And that is all I am praying is that...
一起为你祈祷...
Someday you will understand
到了那天,你终将明白
In God's whole plan
一切都是上帝的安排
And what he does to you
而你终于来到了世间
Oh but baby someday you will breathe
亲爱的孩子,你会呼吸到万物的气息
And you'll finally see
你也终将亲眼看到
See it all in your baby
你所得到的回报
See it all in your baby
就是爱的新生
See it all in your baby
就是爱的新生