I didn't write these, they are from http://wiki.illemonati.com.
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[ Tab from: https://www.guitartabs.cc/tabs/l/lemon_demon/happy_birthday_aaron_crd.html ]
C Em
Aaron, you’re twenty-one
F
Now you can drink
(F)
The night away
G F Em
So go out and have some fun
G C E7
Oh, Aaron, you’re growing up,
F
Soon you’ll be lying
Dm7
In an alleyway
C
Throwing up
C G C
Happy birthday, Aaron (you son of a bitch)
C G C
Have a piece of cake (you son of a bitch)
B Ebm Bb
Blow out all the candles
A7 Ab G C
And make a wish (you son of a bitch)
B-5
(Twenty-one, twenty-one, twenty-one, twenty-one…)
His name is Aaron Ackerson,
he’s turning twenty-one.
His spiral into oldness
Has officially begun.
D
Austin gave him nothing,
E F#
Grievre gave him less,
Bm D
Limekle gave him the finger, and
E
I gave him a dress.
C
Spacecat, another year’s gone by
F
It seems like it’s only been the blink of an eye
C
You’ve been rappin’ and chillin’ for twenty-one years
F
Now you got no choice but to drink a lot of beers
C
‘till it’s coming out your ears, so get down to Sears,
F
Grab a mug, fill it up, raise it up and say “Cheers”
C
You’re the flyest, tightest amateur DJ
F
You even did a show in your Scooby Doo PJs
Damn!
D C G
Dm7 G
Congratulations, Aaron
Dm7 G
You’re twenty-one and you’re glarin’
C Am G C
You’re two years out of your teens
F G Eb
And baby, you know what that means
Cm Ab Eb Bb
Now you’re a man! (Man!) A man, man, man!
Cm Ab Eb Bb
Now you’re a man! (Man!) A manny manny man,
Cm Ab Eb Bb
A man, man, man! (Man!) You are now a man,
Ab Cm7
You’re a maaaan… now you’re a maaaayon.