First chords post but I play it all the time its perfect: C#m Eb Bb Ab I got a hangover,wo-oh! I've been drinking too much for sure I got a hangover,wo-oh! I got an empty cup,pure me some more Rest is the same and there's a little bridge:
e|--3-8-6-3-1-----1-3--------------------------------------------------------|
B|------------4-4-----1------------------------------------------------------|
G|---------------------------------------------------------------------------|
D|---------------------------------------------------------------------------|
A|---------------------------------------------------------------------------|
E|---------------------------------------------------------------------------|
Easier to play the bridge with capo on first fret,I use it for the whole song too =) Enjoy!!
Source: http://www.azchords.com/t/taiocruz-tabs-37873/hangover2-tabs-423446.html