Putting my defences up
Cause I don't wanna fall in love
If I ever did that
I think I'll have a heart attack
Never put my love out on the line
Never said yes to the right guy
Never had trouble getting what I want
But when it comes to you, I'm never good enough
When I don't care
I can play 'em like a Ken doll
Won't wash my hair
Then make 'em bounce like a basketball
But you make me wanna act like a girl
Paint my nails and wear high heels
Yes, you, make me so nervous
That I just can't hold your hand
You make me glow, but I cover up
Won't let it show, so I'm
Chorus:
Putting my defences up
Cause I don't wanna fall in love
If I ever did that
I think I'll have a heart attack
I think I'll have a heart attack
I think I'll have a heart attack
Never break a sweat for the other guys
When you come around, I get paralyzed
And every time I try to be myself
It comes out wrong like a cry for help
It's just not fair
Brings more trouble than love is worth
I gasp for air
It feels so good, but you know it hurts
But you make me wanna act like a girl
Paint my nails and wear perfume
For you, make me so nervous
That I just can't hold your hand
You make me glow, but I cover up
Won't let it show, so I'm
Chorus:
Putting my defences up
Cause I don't wanna fall in love
If I ever did that
I think I'd have a heart attack
I think I'll have a heart attack
I think I'll have a heart attack
The feelings are lost in my lungs
They're burning, I'd rather be numb
And there's no one else to blame
So instead I'll take off in a run
I'm flying too close to the sun
And I'll burst into flames
You make me glow, but I cover up
Won't let it show, so I'm
Chorus:
Putting my defences up
Cause I don't wanna fall in love
If I ever did that
I think I'll have a heart attack
I think I'll have a heart attack
I think I'll have a heart attack
I think I'll have a heart attack
I think I'll have a heart attack
Send "Heart Attack (Demi Lovato)" Ringtone to your Cell 
Source:
http://www.lyricsreg.com/lyrics/the++chipmunks/Heart+Attack+Demi+Lovato/