"Second Heartbeat"是由加拿大歌手艾薇兒·拉維尼（Avril Lavigne）演唱的一首歌曲。以下是這首歌的歌詞：
Verse 1:
You're the first heartbeat
When I close my eyes
You're the first thought in my mind
When I'm feeling blue
You're the only one
Who knows me better than myself
Chorus:
Second heartbeat, keep on beating
Never fail to make me smile
Even when the world is caving in
I know I'll be okay
Verse 2:
I remember when you first kissed me
In the moonlight, on the rooftop
You said you'd always be there for me
And now I believe
Chorus:
Second heartbeat, keep on beating
Never fail to make me smile
Even when the world is caving in
I know I'll be okay
Bridge:
And now my world's spinning out of control
But I know that you'll be here for me
Through every storm, through every low
You're my second heartbeat
Chorus:
Second heartbeat, keep on beating
Never fail to make me smile
Even when the world is caving in
I know I'll be okay, because I've got my second heartbeat.
以上是"Second Heartbeat"的基本歌詞。