First time I've figured out chords to a song, hope they're right!
Sorry about the lyrics if they're wrong, I got them by listening to the leaked 
version. Thanks everyone, enjoy!

Standard Tuning
Capo on 2nd fret

*notes:
In the VERSES you can play 'F' with the high E string open (kinda a Fmaj7)
In the CHORUS you can play the 'G' with the high E string open
It sounds right either way so play it how you think it should be!

Play Fmaj7 like this:

E: --1-- THUMB
A: --3-- FOURTH FINGER
D: --3-- FIFTH FINGER
G: --2-- THIRD FINGER
B: --1-- SECOND FINGER
E: --0-- OPEN

Play G/C like this:
E: --3-- 
A: --2-- 
D: --0-- 
G: --0--  
B: --0-- 
E: --0--

enjoy!

INTRO
C (x32010@1)F (133211@1)C (x32010@1)name="chord_x32010@1">C  F (133211@1)C (x32010@1)VERSE 1
C (x32010@1)          F (133211@1)        CHey (x32010@1)girl I'm waiting on ya
    F (133211@1)        CI'm (x32010@1)waiting on ya
            F (133211@1)              GCome (320003@1)on and let me sneak you out
C (x32010@1)        F (133211@1)        CAnd (x32010@1)have a celebration
  F (133211@1)          CA (x32010@1)celebration
          F (133211@1)            GThe (320003@1)music up the windows down

PRE CHORUS
Am (x02210@1)  (F)
Yeah
         C/F (x4111x@5)         GWe'll (320003@1)be doing what we do
Am (x02210@1)                  FJust (133211@1)pretending that we cool, 
       G/Cand (2431xx@7)we know it too

Am (x02210@1)  (F)
Yeah
         C/F (x4111x@5)           GWe'll (320003@1)be doing what we do
Am (x02210@1)                    FJust (133211@1)pretending that we cool, 
    G/CSo (2431xx@7)tonight

CHORUS
         C (x32010@1)                      GLet's (320003@1)go crazy crazy crazy til we see the sun
Am (x02210@1)                         Fmaj7I (1x3210@1)know we only met but let's pretend it's love
    C (x32010@1)                        GAnd (320003@1)never never never stop for anyone
Am (x02210@1)                  Fmaj7 (1x3210@1)               CTonight (x32010@1)let's get some and live while we're young

G Am F
(Woah)
                     C (x32010@1)      GAnd (320003@1)live while we're young
Am (x02210@1)                  F (133211@1)                   
Tonight let's get some and live while we're young

C (x32010@1)F (133211@1)C (x32010@1)VERSE 2
C (x32010@1)          F (133211@1)        CHey (x32010@1)girl it's now or never
     F (133211@1)      CIt's (x32010@1)now or never
           F (133211@1)               GDon't (320003@1)over think just let it go
C (x32010@1)       F (133211@1)     C (x32010@1)        F (133211@1)    CAnd (x32010@1)if we get together, yeah get together
              F (133211@1)                 Gdon't (320003@1)let the pictures leave your phone

PRE CHORUS
Am (x02210@1)  (F)
Yeah
         C/F (x4111x@5)           GWe'll (320003@1)be doing what we do
Am (x02210@1)                    FJust (133211@1)pretending that we cool, 
    G/CSo (2431xx@7)tonight

CHORUS
         C (x32010@1)                      GLet's (320003@1)go crazy crazy crazy til we see the sun
Am (x02210@1)                         Fmaj7I (1x3210@1)know we only met but let's pretend it's love
    C (x32010@1)                        GAnd (320003@1)never never never stop for anyone
Am (x02210@1)                  Fmaj7 (1x3210@1)               CTonight (x32010@1)let's get some and live while we're young

G Am F
(Woah)
                     C (x32010@1)      GAnd (320003@1)live while we're young
Am (x02210@1)                  F (133211@1)                   CTonight (x32010@1)let's get some and live while we're young

G (320003@1)Am (x02210@1)F (133211@1)BRIDGE
    C (x32010@1)  G (320003@1)      Am (x02210@1)                      F (133211@1)      CAnd (x32010@1)girl you and I we're 'bout to make some memories tonight
G (320003@1)                      AmI (x02210@1)wanna live while we're young
Fmaj7
We wanna live while we're young

CHORUS
         C (x32010@1)                      GLet's (320003@1)go crazy crazy crazy til we see the sun
Am (x02210@1)                         Fmaj7I (1x3210@1)know we only met but let's pretend it's love
    C (x32010@1)                        GAnd (320003@1)never never never stop for anyone
Am (x02210@1)                  Fmaj7 (1x3210@1)               CTonight (x32010@1)let's get some and live while we're young

C (x32010@1)                      GLet's (320003@1)go crazy crazy crazy til we see the sun
Am (x02210@1)                         Fmaj7I (1x3210@1)know we only met but let's pretend it's love
    C (x32010@1)                        GAnd (320003@1)never never never stop for anyone
Am (x02210@1)                  Fmaj7 (1x3210@1)               CTonight (x32010@1)let's get some and live while we're young

G (320003@1)Am (x02210@1)F (133211@1)C (x32010@1)G (320003@1)Am (x02210@1)                  Fmaj7 (1x3210@1)               CTonight (x32010@1)let's get some and live while we're young