This a super easy song, he uses the same progression the whole time! Listen to the recording to 
get the changes down, they're really easy to hear! Any chord with a * just means single strum.

Standard Tuning
Intro: B A E E

                 B
This ain't about tailgates
            A
Ain't about bonfires
            E
Ain't about souped up cars, water towers
   E*
Or drowning in a bottle of Jack
                 B
This ain't about Chevy's
            A
Ain't about money
            E
Ain't about blue suede shoes, coo-coo-ca-choos
    E*
Got nothin' to do with that

                    B
It's a song about a girl
             A
It goes like this
           E
Ah, little heartbreak queen 

Rockin' the jeans
E
Baby, just read my lips
                    B
It's a song about a girl
                     A
The one you can't forget
    E
Ah, blows your mind every time
    E
You think it's gonna be a hit
                    B
It's a song about a girl
   A                  E                 E
Ah, it's a song about you, oh, yeah

This ain't about hometowns
Ain't about back roads
Ain't about shoulda, coulda, wish I woulda
Rear views looking back
This ain't about goodbyes
Ain't about come-backs
Oh, got nothing to do with the stars and the moon
Man you're gettin' way off track

It's a song about a girl
It goes like this
Ah, little heartbreak queen
Rockin' the jeans
Baby, just read my lips
It's a song about a girl
The one you can't forget
Ah, blows your mind every time
You think it's gonna be a hit
It's a song about a girl

Baby you ooo ooo ooo, yeah you ooo ooo ooo, yeah you ooo ooo, know who you are
Baby you ooo ooo ooo, yeah you ooo ooo ooo, read my lips, hear my heart
Listen to this guitar

It's a song about a girl
It goes like this
Ah, little heartbreak queen
Rockin' the jeans
Baby, just read my lips
It's a song about a girl

Every time
Ah, don't think too hard
Dig too deep
Or read between the lines

It's a song about a girl
It goes like this
Ah, little heartbreak queen
Rockin' the jeans
Baby, just read my lips
It's a song about a girl
The one you can't forget
Ah, blows your mind every time
You think it's gonna be a hit
It's a song about a girl, girl oh

It's a song about a girl, girl, oh, yeah
It's a song about a girl, girl, oh

It's a song about a girl

This ain't about tailgates
Ain't about bonfires
Ain't about souped up cars, water towers
Drowning in a bottle of Jack