Biography: ​From Wikipedia, the free encyclopedia D12 (also known as D-12, and The Dirty Dozen) is an American hip hop group from Detroit, Michigan. D12 has had chart-topping albums in the United States, United Kingdom, and Australia. D12 was formed in 1996, but only achieved mainstream success when one of its members, Eminem, rose to international fame. Description above from the Wikipedia article D12, licensed under CC-BY-SA, full list of contributors on Wikipedia.