Fergie is the new face of Mac's Viva Glam campaign following in the footsteps of Dita Von Tesse and Eve.
The Black Eyed Peas singer is the latest celebrity to endorse the Viva Glam range which supports the Mac Aids fund.
The range of cosmetics is sold all over the world with 100% of profits going to fight HIV and AIDS.
The fund has raised over $100 million so far and 7.1 million Viva Glam Lipglass and Lipstick have been sold.
Fergie has also been speaking out today about her position as a role model and how she's keen to promote safe sex to her fans.
"I think I can be very helpful to some of these people. I know certain people who are very proud of having unprotected sex and the fact that they haven't caught anything yet. But that's not right," she said.
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