The United Nations, as of this moment, follows 537 people on Twitter. Most of them are international organizations or politicians. Some are musicians. One is a porn star.

The adult actress, known as Penelope Black Diamond, is a German porn star who tweets under the handle @BigBustyStar. The voluptuous 31-year-old has been in the business since 2003, and has accumulated more than 1,000 followers on Twitter. As first noticed by a forum member on Free Republic, she apparently has at least one fan at the UN, as well.

It's worth noting that Diamond isn't the only "celebrity" on the UN's list of followers — Shakira and Ricky Martin are there, too — but she's certainly the most... curious.

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Update: It appears that the UN's account is no longer following PenelopeBlackDiamond, for better or worse.