One day I woke up
  I woke knowing
  Today is the day
  I will die
      Cashdogg was barking
  Went to the park and enjoyed it one last time
  I called my mother, told her I loved her
  And I begged her not to cry
      I wrote a letter
  I said I'd miss her
  And I signed that Goodbye
      [Chorus:]
  You know the happiest day of my life
  I swear the happiest day of my life
  Is the day that I die
  Can you feel the cold tonight (the day that I die)
  It sets in, but it's alright (the day that I die)
  The darkness falls, I'm letting go (the day that I die)
  All alone but I feel fine (the day that I die)
      We took a drive and we drove to D.C.
  To see the places we live
  Our conversations we talked of old friends
  And all the things that we did
      Summer nights
  Drunken fights
  Mistakes we made
  Did we live it right
      [Chorus:]
  You know the happiest day of my life
  I swear the happiest day of my life
  Is the day that I die
  Can you feel the cold tonight (the day that I die)
  It sets in, but it's alright (the day that I die)
  The darkness falls, I'm letting go (the day that I die)
  All alone but I feel just fine (the day that I die)
      [Chorus:]
  You know the happiest day of my life
  I know the happiest day of my life
  I swear the happiest day of my life
  I know the happiest day of my life
  Is the day that I die
  Can you feel the cold tonight (the day that I die)
  It's thin air but that's alright (the day that I die)
  The darkness falls, I'll let it go (the day that I die)
  All alone but I feel fine (the day that I die)
      Did I live it right, I hope I lived it right (the day that I die)
  Did I live it right, I know I lived it right (the day that I die)
  Did I live it right, I hope I lived it right (the day that I die)
    [ Thanks LoGaN for correction ]