Lyrics:

Hey, hey, hey, hey
Tonight is the night, girl
What can I do?
You got me going crazy for you
Tonight is the night, girl
What can I say?
Wanna get with you in every way
Tonight is the night
Tonight is the night
Tonight is the night, girl
I can give you what you want
Again, again and again
And that's my word
Let me break it down for you
So that you'll understand
Got my only mission is to be your man
So don't
(So don't)
Let go
(Let go)
Of my heart
(My heart)
'Cause I can't take no more
(No more)
It's not hard
(Not hard)
To believe, we'll never be apart
(To believe)
Tonight is the night, girl
What can I do?
You got me going crazy for you
Tonight is the night, girl
What can I say?
Wanna get with you in every way
Tonight is the night
Tonight is the night
Tonight is the night, girl
(You, yeah, heh)
Tonight
Let me take it to the top
And make you say ooo-wee
Call me, papy
Bet you didn't know that
I'm afraid that this is true
Your the only one I'll be running too
So don't
(So don't)
Let go
(Let go)
Of my heart
(My heart)
'Cause I can't take no more
(No more)
It's not hard
(Not hard)
To believe, we'll never be apart
(To believe)
Tonight is the night, girl
What can I do?
You got me going crazy for you
Tonight is the night, girl
What can I say?
Wanna get with you in every way
Tonight is the night
Tonight is the night
Tonight is the night, girl

This, this, this is the Underdog
Tonight is the night, girl
What can I do?
You got me going crazy for you
Tonight is the night, girl
What can I say?
Wanna get with you in every way
Tonight is the night, girl
What can I do?
You got me going crazy for you
Tonight is the night, girl
What can I say?
Wanna get with you in every way
This, this, this is the Underdog