Hey, 
here are the chords and the nice piano intro from the Song:

Her World goes on - Bruno Mars feat. David Guetta, Justin Michael & Kemal

Have fun!

Standard Tuning.
Piano Intro:

e|---3---------2---------2---------0------------|
B|------5---------3---------3---------2---------|
G|---------4---------4---------2---------2------|
D|----------------------------------------------|
A|----------------------------------------------|
E|----------------------------------------------|
      [Em]      [Bm]       [D]       [A]

Verse 1:

Em (022000@1)          Bm (x24432@1)         D (xx0232@1)       A (x02220@1) I'm traveling without her somewhere far away
Em (022000@1)            Bm (x24432@1)       D (xx0232@1)        A (x02220@1) I keep thinking about her but I know I can't stay
 Em (022000@1)                             BmShe (x24432@1)haunts me like a nightmare, her image is everywhere
D (xx0232@1)                      A (x02220@1) She doesn't leave me alone
Em (022000@1)                 Bm (x24432@1) I can't escape her or erase her
D (xx0232@1)                  A (x02220@1) When I know she's not coming home

Refrain:

Em (022000@1)                Bm (x24432@1)I can't understand where I went wrong
     D (xx0232@1)                     AI (x02220@1)can't understand where her love has gone
     Em (022000@1)         BmI (x24432@1)don't know where I belong
     D (xx0232@1)        
My world is over
               Em (022000@1)   Bm (x24432@1)   D (xx0232@1)  AWhen (x02220@1)life goes on and on and on (her world goes on)
               Em (022000@1)   Bm (x24432@1)   D (xx0232@1)  AWhen (x02220@1)life goes on and on and on (my world is gone)

Verse 2: (repeat Em - Bm - D - A)

Am I crazy or just human
Is this what heartbreak is
What should I be doing
It feels like I got seconds to live
she haunts me like a nightmare, her image is everywhere
she doesn't leave me alone
I can't escape her or erase her
When I know she's not coming home

Refrain: (repeat Em - Bm - D - A)

I can't understand where I went wrong
I can't understand where her love has gone
I don't know where i belong
My world is over
When life goes on and on and on (her world goes on)
When life goes on and on and on (my world is gone)

My world is over while her world goes on
I can't understand where I went wrong
I can't understand where her love has gone
I don't know where i belong
My world is over

When life goes on and on and on (her world goes on)
When life goes on and on and on (my world is gone)