No. 1 D.C.'s ranking as the most popular destination to move to in 2010, according to a new "migration" study by United Van Lines. This is the third year in a row that the District has clinched the top spot. The study is based on moving orders booked through United Van Lines and does not account for other moving companies or people who have moved themselves. As for states that people are moving out of, New Jersey received the top honor. Don't tell Snooki.