Naomi Campbell is struggling to quit smoking.
The 43-year-old model - who checked into rehab in 1999 to seek help for a cocaine addiction - is determined to kick the bad habit since she doesn't want to have to stand on ''street corners'' lighting up but confessed it has been more difficult than she expected.
She told Shape magazine: ''People told me that cigarettes are harder to quit than alcohol. I didn't believe it, but you know what? It is harder.
''I'm not someone who wants to light up inside people's homes, including my own, and I don't want to stand outside on street corners anymore.
''It's still a struggle. In fact, just talking about it makes me crave one, so let's stop, please! But I am really trying.''
Naomi - who is using nicotine patches to try and wean herself off all kinds of cigarettes - has previously admitted she enjoys life more since giving up alcohol.
She has said: ''I choose not to drink today in my life because I find that I'm allergic to alcohol.
''I have more energy and I have more fun than when I was drinking and I can hang out really late and get up early in the morning with no hangovers and still smile.''