Dr. Dre ft. Eminem, Skylar Grey

The intro pattern is the same throughout the female vocals of the song.

Bm                  G
Im about to lose my mind
                         A
you've been gone for so long
                    F#m
I'm running out of time
           G
I need a doctor
            Bm
call me a doctor
          F#
I need a doctor, doctor
                    Bm
to bring me back to life


Enjoy!