Complicated by Avril Lavigne guitar tab (text):

This is for acoustic and electric.  Some parts do not have acoustic playing, but I included them anyways
Intro
Dm        F       C
   Uh huh. Uh huh.  Cause life's like this.
Dm        F       C
   Uh huh. Uh huh.  That's the way it is.
Dm        F       C
         (lalalala)Cause life's like this.
Dm        F       C
   Uh huh. Uh huh.  That's the way it is
Verse 1:
F
 Chill out, what cha yelling for.
Dm
 Lay back, it's all been done before.
Bb                     C
 And if you could only let it be, you would see
F
 I like you the way you are
Dm
 When we're driving in the car
Bb                        C
 And you're talking to me one on one, but you've become
Prechorus
F
Somebody else 'round everyone else
Dm
Watching your back like you can't relax
F                                       C
Try to be cool, you look like a fool to me.  Tell me
Chorus
Dm                            Bb              F
Why'd cha have to go and make things so complicated
C
I see the way you're
Dm                          Bb               F
Acting like you're somebody else gets me frustrated
C
Life's like this you
F
You fall and you crawl and you break and you
Dm
Take whatcha get and you turn it into
F
Honestly and promise me I'm never gonna find you
C (let it ring)
Faking.
       
No no no
Verse 2 (start playing F on the last "no" in the chorus to start this verse)
F
(no)  You come over unannounced
Dm
 Dressed up like you're something else
Bb                             C
 Where you are ain't where it's at you see, you're making me
F
 Laugh out when you strike a pose
Dm
 Take off all your preppy clothes
Bb                      C
 And if you could only let it be, you would see
Prechorus
Chorus
Bridge (start playing "F" on the last no of the chorus)
F
(no) No no no
Dm
No no no no
Bb
No no no no
C
No  (mmm)
Prechorus (let the last "C" ring to lead into the Chorus)
Chorus  X2