Heartbeat.

♫ I saw you talking on the phone

  I know you're not alone
           But you stole my heart
      You stole my heart

♪ You act like you're alone

But I saw you with a girl
Stop trying to steal my heart
Stop trying to steal my heart

 ♫ Maybe it's the way it moves

You make me dream like a fool
I can steal your heart
I can steal your heart
No matter what you think
I'm not the kind of girl you think
And give you my heart
Stop trying to steal my heart

♫ I can feel your heart beat

He told me
 
You're stealing my heart