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Lauren Conrad is sporting a mustache — but for a good reason.

The reality star has partnered with the “got milk?” campaign  to teach teens that beauty isn’t only in the cosmetics aisle or on fashion racks.

As part of the partnership, Lauren is asking teens to cast their votes to make “got milk?” history and help style the milk mustache ad she’ll appear in this spring.

Visit bodybymilk.com to vote on your fave mustache look–cool and casual “California Girl” or fun and flirty “Night Out.”

One dollar for every vote will go to DonateMyDress.org, the first national network to bring together local dress drive organizations across the U.S. to help ensure every girl can have a dream night at her prom.

In addition, for each vote cast, teens will be entered to win fashion and beauty prizes from Lauren’s ad shoot. One person will be selected to win a professional style session and will appear alongside Lauren as she reveals the ad voters choose.