The 31-year-old singer, who has just released her first solo single 'London Bridge, issued the stern advice to gays who are regulars on the club scene and take ecstasy, insisting the substance only leads to harder drugs.
Fergie, who overcame an addiction to crystal meth, told gay magazine HX: "In my experience, ecstasy leads to crystal meth, and I just think that people don't know how addictive that drug is. It's so cunning because it's such a fun drug at first. You lose weight and look great for a while, but I don't care if it takes six months or five years, it will creep up on you. Don't be fooled and think you're special."
Fergie has also slammed the growing number of blogs on the internet - a subject she tackles in her song 'Pedestal' on her new album 'The Dutchess'.
She said: "I just think, 'Wow, I've worked so hard for this, but what are you people doing other than sitting there behind your computers and talking s**t about people?'
"If people don't like me, fine, but don't criticise people if you're not getting off you're a** and doing something about your own life."

Fergie’s debut solo album, The Dutchess, is in stores now. The Black Eyed Peas singer’s 13-track set features the single "London Bridge," along with collaborations with Ludacris, will.i.am and Rita Marley