My friend has a cigarette problem what should I do?

My friend is a 25 year old tall beautiful woman with curves in all the right places and she models professionally.

However in the culture with her other friends she started smoking socially four years ago. And it progressively escalated.

This last year and a half since she turned 24 has been really rough though and it's hard to watch. She's been smoking a pack plus a day then smoking hookah in the evenings. And she's looking terrible her hair lost is loosing it's luster, she looks tired and sick, her teeth are yellowing, and it's really horrible.

I'm not sure what caused this addiction she never drank or did drugs. And as her friend I'm just not sure what to do. I'm really scared she's going to die young from this or ruin everything she's worked towards.

My friend has a cigarette problem what should I do?
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