AceShowbiz - Tyra Banks shows off her grey hair as she prepares to turn 50 next month. The "America's Next Top Model" host will hit the milestone on December 4 and she's opened up about ageing gracefully by refusing Botox injections and keeping herself looking youthful naturally.

"I've got grey hair - I'm not showing it tonight but my man [boyfriend Louis Belanger-Martin] loves my grey hair ...," she told DailyMail.com.

"When I was younger, 50 was old right? It was like a grandma age or something. Now I look at Jennifer Lopez, I look at Halle Berry, I look at Jennifer Aniston, and I'm like, 'What the hell is 50?' I don't even know. I've even been looking in the mirror and I'm like, 'Really?' "

Tyra went on to insist she thinks putting a bit of weight on has helped keep the wrinkles at bay. She added, "I do think one secret is extra weight, because I've not been too skinny. I think if you're really skinny, it will age your face. So I think a bit of juice, as it keeps the face nice and juicy naturally. I haven't had injections."

She has previously insist she doesn't want a huge party for her 50th birthday and warned her boyfriend Louis Belanger-Martin not to organise a surprise for her. Tyra told PEOPLE, "My man, he wanted to throw this huge 50 year old birthday for me and I kind of found out about it. I let him know, I have no desire to do that. I just want to go to Disneyland with the family."

She added of her big birthday, "I keep saying I'm 50, even though I'm not, as an excuse. When people ask me I say, 'I ain't doing that - I'm 50.' Or, 'I'm just going to tell you what I think, because I'm 50.' "