Pop superstar Mariah Carey is so terrified of getting older she refuses to acknowledge her birthdays. The Butterfly star never celebrates her advancing years, instead preferring to think of herself as a perpetual child. The 37-year-old has even gone as far to ban the word "birthday" - referring to them instead as "anniversaries". She says, "I'm eternally 12. And that 12-year-old inside me is an eternal optimist. Honestly, I don't even have birthdays. "I call them anniversaries. It really is about how young you feel. Some people convince themselves they are old, or they think, 'I have to grow up now'. "I will still always choose a day at Disney World over a night in Las Vegas. That's who I am."