[Blake & Katy]
I can't believe we're only 18
I'm 20-something in my heart
I think I met you in a daydream
That's why we never fall apart

I was hangin' with my girlfriends
I was hangin' with the guys

I can't believe we're only 18
I'm 20-something in my mind

[Katy]
Don't sleep on a train to Tokyo
I wanna know if your heart's still beating
Don't sleep on a train to Tokyo
I wanna know when you're gonna leave me
(I can't believe we're only 18
I'm 20-something in my heart)

Don't sleep on a train to Tokyo
I wanna know if your heart's still beating
Don't sleep on a train to Tokyo
I wanna know when you're gonna leave me
(I think I met you in a daydream
That's why we never fall apart)
Don't sleep on a train to Tokyo
I wanna know if your heart's still beating
(You were hangin' with your girlfriends
I was hangin' with the guys)

Don't sleep on a train to Tokyo
I wanna know when you're gonna leave me
(I can't believe we're only 18
I'm 20-something in my heart)