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The fashion industry's yearly shopping extravaganza, Fashion's Night Out,  has enlisted the help of music's most stylish stars to spread the word.

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Justin Bieber and Taylor Swift are the faces of 2012's FNO, a global event allowing buyers to shop 'til they drop for a good cause. The trendy twosome have teamed up to promote the event's fourth year, as well as the FNO collection-- which gives forty percent of its proceeds to the New York City Aids fund.

Check out our exclusive teaser in the player above! The full length PSA will debut this Tuesday on FashionsNightOut.com.

Fashion's Night Out begins September 6.