E|-0-------------0-----------------------|
B|-0-------------0-----------------------|
G|-4-------------4-----------------------|
D|-2-------------1-----------------------| Chord pattern 1
A|-0-------------2-----------------------|
E|-0-------------0-----------------------|


E|-0-------------0-----------------------|
B|-0-------------0-----------------------|
G|-2-------------4-----------------------| Chord Pattern 2
D|-4-------------6-----------------------|
A|-4-------------6-----------------------|
E|-0-------------0-----------------------|

Nice and simple, 4 chords.
Play the G string with your baby finger, much easier for the changes.



You think I'm pretty
Without any make-up on
You think I'm funny
When I tell the punch line wrong      (Chord pattern 1)
I know you get me
So I let my walls come down


Before i met you
I was alright
But things were kinda heavy
You brought me to life                (Chord pattern 1)
Now every February
You'll be my Valentine,
Valentine...

Let's go all the way tonight
No regrets, just love
We can dance until we die             (Chord pattern 2)
You and I
We'll live forever

You make me
Feel like
I'm living a Teenage Dream
The way you turn me on                (Chord pattern 1)
I can't sleep
so take a chance
And don't ever look back
Don't ever look back

My heart stops
When you look at me
Just one touch
Now baby I believe                    (Chord pattern 2)
This is real
So take a chance
And don't ever look back
Don't ever look back, back, back

We drove to Cali
And got drunk on the beach
Got a motel and
Built a fort out of sheets            (Chord pattern 1)
I finally found you
My missing puzzle piece
I'm complete

Let's go all the way tonight
No regrets, just love
We can dance until we die             (Chord pattern 2)
You and I
We'll live forever

You make me Feel like
I'm living a Teenage Dream
The way you turn me on
I can't sleep                         (Chord pattern 1)
So take a chance
And don't ever look back
Don't ever look back

My heart stops
When you look at me
Just one touch
Now baby I believe                    (Chord pattern 2)
This is real
So take a chance
And don't ever look back
Don't ever look back

I might get your heart racing
In my skin-tights jeans
Be your Teenage Dream tonight
I might get your heart racing
In my skin-tight jeans               (Chord pattern 1)
Be your Teenage Dream tonight             #Gentle strums on this verse.
Tonight,tonight,tonight,
Tonight,tonight,tonight
Tonight, Tonight, Tonight.



Once you've got the jist on when to change chords its not that difficult.
I'd advise listening to the video to listen for the pauses, strumming and muting.
Its mainly downstrokes throughout the song. Im happy to take comments and constructive 
criticism as this is my first tab. HAPPY DAYS :)