there have been many many many many many stories in entertainment news about mariah carey being a possible junkie and just plain nuts. a google search will turn up plenty.
however....I dont' think she would have written this, just because she is the star...I'm sure her staff goes through her email.
mariah carey was fired from 20 restuarants as a youth for her "attitude"
We know that Mariah is nuts, she tried to kill herself on her Mom's front lawn last year! (then they took her away to the looney bin)
Having your older sister turn tricks and being supported by her starting her musical career must have really done something to her head, like she doesn't deserve her success or something.