He uses A5 , D5 , G5 , C5 , and Em.

The song is in Eb, which is
Eb5    Eb5
Ab5    Ab5
C#5 or C#5
F#5    F#5
Bb5    Bb5
Eb5    Eb5




[Chorus: x2]
A5
Soulja Boy Off In This Hoe
D5
Watch me Crank It
Watch me Roll
G5
Watch me Crank Dat Soulja Boy
     C5             E5
Then Super Man Dat Hoe
     A5
Now, You...
(Crank Dat Soulja Boy)
D5
You...
(Crank Dat Soulja Boy)
G5
You...
(Crank Dat Soulja Boy)
C5
You...     E5
(Crank Dat Soulja Boy)

[Verse 1:]
A5
Soulja Boy Off In This Hoe
D5
Watch me Lean And Watch Me Rock
G5
Super Man Dat Hoe
     C5                  E5
Then Watch me Crank Dat Robocop
A5
Super Fresh, Now Watch Me Jock
D5
Jocking On Them Haterz Man
G5
When I Do Dat Soulja Boy
  C5                    E5
I Lean To The Left And Crank Dat Dance
     A5
(Now You)
    D5
I'm Jocking On Yo Bitch Ass
    G5
And If We Get The Fightin
     C5                   E5
Then I'm Cocking On Your Bitch Ass
A5
You Catch Me At Yo Local Party
D5
Yes I Crank It Everyday
G5
Haterz Get Mad Cause
 C5             E5
"I Got Me some Bathing Apes"

[Chorus x2]

[Verse 2:]
A5
I'm Bouncin On My Toe
D5
Watch me supersoak dat hoe
G5
Watch me take it to Areab
             C5             E5
And he gonna take it up fo sho
A5
Haterz Wanna Be Me
       D5
Soulja Boy, I'm The Man
        G5
They Be Lookin At My Neck
       C5              E5    A5
Saying is them rubber bands man? (man)
         D5
Watch me Do It (Watch Me Do It)
G5
Dance (Dance)
C5              E5
Let Get To It (Let Get To It)
A5
Nope, You Can't Do It Like Me
D5
Hoe, So Don't Do It Like Me
G5
Folk, I See You Tryna Do It Like Me
C5                 E5
Man That Shit Was Ugly

[Chorus x2]
A5
I'm To Clean Off In This Hoe
D5
Watch Me Crank And
Watch Me Roll
G5
Watch Me Crank Dat Roosevelt
C5                    E5
Then Super soak That Hoe,
A5
I'm to Fresh Off In This Bitch
D5
Watch Me Show
Now Watch Me Gig
G5
Watch Me Crank My Shoulder Work
    C5             E5
And Superman That Bitch,
A5
Superman That Bitch,
D5
Superman That Bitch,
G5
Superman That Bitch,
C5             E5
Superman that Bitch
(Awwwwwww) (You)

[Chorus x2]