Pregnant Evangelista, who models designer coats in the August 2006 Vogue, is a big fan of the controversial wrinkle-erasing injections, while Turlington insists she'll never try Botox.

Speaking about the ageing process, 41-year-old Evangelista admits it's tough being her, adding, "It's a lot of upkeep."

She says, "I'm pro-cosmetic procedure. I use Botox and I'm not afraid to say it, though I do like to keep some movement in my face.

"I do Thermage, a treatment to stimulate your collagen... For me, it's just for enhancement, like hair colour or make-up or any other tricks you can do to make yourself feel better."

Evangelista admits she's Botox-free at the moment, because she's pregnant.

Turlington, 37, on the other hand, is not a fan of Botox, insisting she'll never agree to have her face injected.

She says, "I'm not afraid of aging. I would absolutely not do Botox. It actually makes me feel happier about my face when I look at people my age.. who've had it done."