Donna Karan is selling a bracelet exclusively on Twitter, which will benefit her Urban Zen Foundation.
Once you’ve connected your account, you can tweet with the hashtag #BuyUrbanZenBracelet and look for an automated response from @AmexSync. The automated Twitter bot will @mention your Twitter handle with a link to confirm your purchase. If you tweet the confirmation hashtag within 15 minutes of the @AmexSync reply, your purchase will be complete.
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via Tumblr Donna Karan Sells Charity Bracelets Exclusively on Twitter