I Don't Know What Love Is是影片《一个明星的诞生》的插曲，由Lady Gaga和Bradley Cooper共同演绎。《一个明星的诞生》是由布莱德利•库珀执导，Lady Gaga、布莱德利•库珀领衔主演的音乐爱情片，于2018年8月31日在意大利第75届威尼斯国际电影节首映。该片翻拍自美国1937年版同名电影，讲述了日渐过气的乡村乐明星杰克逊帮助一个有着明星梦的年轻女孩艾利实现音乐梦想的故事。
I Don't Know What Love Is歌词：
Lady Gaga：
I don't know what love is
If I can't have you here
I don't know what love is
I think that it's just fear
Both：
I don't know the tempo
Of my heart's concerto
It's all seems like a dream
It's not I know
There's something real out there for me
I swear I've seen an angel
A paradise in blue
Every color I choose
But I don't know what love is
But I think it might be you
Bradley Cooper：
If I had the courage
I'd know just what to do
Sometimes I have to crawl
And everyday I fall
Tryin' just to stand by you
Both：
I swear I've seen an angel
A paradise in blue
Every color I choose
But I don't know what love is
But I think it might be you
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