《Heartbeat》的歌詞如下：
女聲：
I don't want to be this way with you
我不想和你這樣
I don't want to carry around these tears
我不想讓這些淚水在我的身邊環繞
But when I hear that beat again
但當我又聽到這心跳聲
I know that I will always come back again
我知道我會再一次回來
男聲：
But it's so hard for me to breathe
但我呼吸變得如此困難
When I'm not with you
當我和你分開時
It's like my heart is breaking in two
就像我的心被撕成兩半
女聲：
I don't want to be this way with you
我不想和你這樣
I don't want to feel this way anymore
我不想再有這樣的感覺
But when I hear that beat again
但當我又聽到這心跳聲
I know that I will always come back again
我知道我會再一次回來
合唱：
And I don't want to lose this feeling
我不想失去這種感覺
I don't want to feel this way anymore
我不想再有這樣的感覺
But when I hear that beat again
但當我又聽到這心跳聲
I know that I will always come back again
我知道我會再一次回來
男聲：
And I can't believe I fell so far behind
我不敢相信我落後了這么多
And now I'm standing here, all alone again
現在我獨自站在這裡
But when I hear that beat again
但當我又聽到這心跳聲
I know that I will always come back again
我知道我會再一次回來
合唱：
And I don't want to lose this feeling
我不想失去這種感覺
I don't want to feel this way anymore (No)
我不想再有這樣的感覺（不）
And if it ends up breaking every single one of my heartbeats (Every single one)
如果結果每一次都撕裂我的每一顆心跳（每一次）
I'm going down, going down, yeah, I'm going down with you now baby (Oh yeah)
我現在要走了，跟你一起走，寶貝（喔，是的）
這是一首關於分離和渴望重新相遇的歌曲，表達了對對方深深的思念和無法控制的情感。