It's a known fact that Mariah Carey is ageless, so it's not surprising that she doesn't celebrate her birthday. She does technically have an age (46) and a birthday (March 27, 1970), but none of that matters in Mimi's World. She is a goddess, and as such, she doesn't adhere to the normal conventions that weigh us mere mortals down. She told People in November, "I think I have to remain eternally oblivious to age. Honestly, when you put a number on it yourself, it’s just like, Why? Why do that?" Seriously, why?
Nothing else about Carey is normal—her voice is absolutely legendary (and so is her rider), she has her own (wonderfully awful) movie, she basically lives in lingerie, she's rumored to have had her legs insured, and her fiance, James Packer, is a billionaire. So when she told Complex, whose August/September cover she graces, "I don’t have a birthday. I was just dropped here. It was a fairyland experience," it's almost believable.