Letra da Música Back It Up de Joan Jett & The Blackhearts

(J. Jett/R. Byrd/R. Browde)

All I hear is what you're worth
With all those things you had before
All I see is what you are
With all your talks you got you for
Take your time to face the truth
You got no class you got no couth

(What is it that you're trying to prove)
(Can you tell me)
Yeah can you back it up
Who're you trying to fool
Yeah you're still talking tough
Show me what you can really do

You're insecure and yeah it shows
And then you think that no one knows
If you only heard yourself
You'd wish that you were someone else
Hey boy take your time to change your line
Your talking shit your wasting time

(What is it that you're trying to prove)
(Can you tell me)
Yeah can you back it up
Who're you trying to fool
Yeah you're still talking tough
Show me what you can really do

I believe you concede
He's a fag come on change your act

(What is it that you're trying to prove)
(Can you tell me)
Yeah can you back it up
Who're you trying to fool
Yeah you're still talking tough
Show me what you can really do