Caitlyn Jenner: I'm a MAC Makeup Girl Now!

Caitlyn Jenner is officially a makeup queen ... she's going into business with MAC Cosmetics.

The makeup giant is releasing a limited edition lipstick created by Caitlyn. The signature color will be called "Finally Free."

Revenue from the lipstick sales will benefit the MAC AIDS Fund Transgender Initiative.

Caitlyn joins some other heavy hitter celeb chicks -- Rihanna, Nicki Minaj, Lady Gaga and Pamela Anderson ... have all released their own signature colors of lipstick or lip gloss.

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