Mariah Carey Remains 'Eternally Oblivious' to Aging The star tells PEOPLE all her glam secrets By Jillian Ruffo Published on November 25, 2015 02:00 PM Share Tweet Pin Email Mariah Carey looks amazing for 45. One of her secrets? The singer tells PEOPLE she simply doesn’t acknowledge her age. Mark Sagliocco/Getty “I think I have to remain eternally oblivious to age,” she shares. “Honestly, when you put a number on it yourself, it’s just like, Why? Why do that?” Carey, who has her first makeup collaboration in the works with M.A.C Cosmetics, a champagne lipstick called “All I Want” (available December 3rd), says that a “good hair and makeup team” keeps her feeling beautiful. RELATED PHOTOS: Barefaced And Beautiful: Celebs’ Best Makeup-Free Selfies And though she’s never not looking totally glam, Carey adds that she prefers to wear as little makeup as she can. “If you’re not wearing a lot of makeup, you don’t have to take a lot of it off. So, my goal is to wear the least amount of makeup possible so I don’t have to steam my face and take it all off.” The beauty school alum shares that she likes to take care of her own skincare and grooms her eyebrows herself — but her DIY skills stop there. When asked whether or not she ever has bad hair days, Carey reveals that she’s not as talented in the hair department. “I do [have bad hair days], and then I have to apply my 500 hours of beauty school,” she says. “If it’s really bad, I’ll just slick it back and put it in a bun.” And when it comes to blowouts, “It used to be really hard. When I was growing up I used to go into the girl’s bathroom and fix the front with a brush on a hand dryer because it would come up. And the back was never smooth cause I couldn’t really reach it. So, I try not to blow dry my own hair. If I have to do my hair from scratch, I’ll keep it natural.” For more on our exclusive interview with Mariah, pick up the new issue of People on newsstands now! — Jillian Ruffo, with reporting by Jackie Fields RELATED VIDEO: Watch Mariah Carey and Billionaire Boyfriend James Packer Make Their Red Carpet Debut