《It Must Be Love》的詞曲作者是Paul McCartney，演唱者是The Faces。歌詞如下：
It must be love
She says,
Got to be the real thing
Gonna find me someone
But I can't be sure
Maybe it's just
The way she leans
The way she shows she wants you
And I'm a fool
But I don't care
I'm a fool for her charms
So it must be love
Must be the way she moves
The way she shows she needs you
So it must be love
Must be the way she looks
The way she shows she wants you
So it must be love
Must be the real thing
It must be love
It must be love
She says,
Got to be the real thing
Gonna find me someone
But I don't know what to do
I'm a fool for her charms
So it must be love
Must be the way she looks
The way she shows she wants you
So it must be love
Must be the real thing
The look on her face, and her perfume
Everything seems to be just like a movie scene to me, yeah!
I ain't been touched like that before
No no no no!
It must be love.
歌詞中還包含了一些更為深入的描述，比如“她靠向前”、“她顯示她需要你”、“她顯示她想要你”等等。這些描述將女方的性感表現以及男方的感覺渲染得淋漓盡致。此外，歌曲還表達了男主角對女方的愛情深如熱火，即使明知自己愚蠢無知，仍然無法抗拒她的魅力。整首歌的旋律和詞句都充滿了熱情和感動，是一首非常動人的情歌。