《Heartbeat》的歌詞如下：
女：
Everytime I close my eyes
I dream about your body
You make my heart beat faster
And I can't explain it
男：
Everytime I see your face
My body gets into motion
And I just can't deny it
You're the one that makes me shine
女：
Oh, yeah
男：
Everytime I feel alone
I look for your embrace
You make my heart beat louder
And I don't even care about my senses
女：
Oh, yeah
男：
Baby you got that certain something
That makes me feel like I'm living a dream
And everytime I'm with you something happens
I can't explain it with words
女：
Oh, baby when you touch me
I feel the heat coming from within
I want to get close to you baby
And let the passion take control of us
男：
Yeah, yeah, yeah
女：
Heartbeat, beat, beat, beat
男：
Baby, it's our rhythm together
女：
Heartbeat, beat, beat, beat
男：
Baby, I feel it in my bones
女：
Everytime you're near me baby
My heart beats so loud
男：Yeah, yeah, yeah, yeah, yeah
女：Oh baby, yeah baby (everytime I see your face) 男：Everytime I feel alone (you make my heart beat faster) 女：Oh baby yeah baby (oh yeah) 男：Baby you got that certain something (that makes me feel like I'm living a dream) 女：Yeah baby (everytime I'm with you something happens) 男：You make my heart beat louder (I can't explain it with words) 合唱：Oh yeah (oh yeah) Oh baby when you touch me (everytime you're near me) 合唱：I feel the heat coming from within (baby) 合唱：I want to get close to you baby (let the passion take control of us) 合唱：Yeah, yeah, yeah (heartbeat) 合唱：Heartbeat, beat, beat, beat (baby) 合唱：Heartbeat, beat, beat, beat (it's our rhythm together) 合唱：I feel it in my bones (everytime you're near me) 合唱：Everytime you near me baby (oh) 結束副歌部分合唱：(everytime your heart beats) 女：Yeah... Yeah! 合唱：Baby it's your rhythm 女: That I dance to 女/合唱：(your heartbeat) 結束曲調合唱(Come on!) 合唱：Everytime your heart beats 女/合唱：(my heart beats so loud) 合唱：(oh yeah) 結束副歌部分(Come on!) 合唱：(everytime your heart beats) 結束歌曲。
這是一首充滿激情和浪漫的歌曲，表達了男女之間深深的情感。歌詞中多次提到了心跳加速、熱情奔放等辭彙，展現了歌曲的熱烈氛圍。