Katy Perry - Waking Up In Vegas Bass

Start playing with the pre-chorus

G-----------------------------------------|
D-----------------------------------------|
A----33-----55----------------------------|     X3
E------------------66------6----6---------|                 

Chourus
G-------------------------------|
D-------------------------------|    X4
A--------33--11-----1---3-------|
E---11--------------------------|

In the middle of 2nd Verse
E-----1\7-----|

Pre-chorus
G-----------------------------------------|
D-----------------------------------------|
A----33-----55----------------------------|     X3
E------------------66------6----6---------|                 

Chorus
G-----------------------------|
D-----------------------------|      X4
A--------33--11-----1---3-----|
E---11------------------------|

"you got me into this...."
G-----------------------------------------|
D-----------------------------------------|
A----------333----------------------------|
E---111-----------666---------101010------|

" And get some...." 
G---------------------------------------|
D---------------------------------------|
A----33-----55--------------------------|    X3
E------------------66------6----6-------|                 

Chorus, then till the end 
G--------------------------------|
D--------------------------------|                          
A--------33--11-----1s3----------|
E---11---------------------------|