Michelle Obama turned 50 this week and she made sure she rang in her fifth decade of life with an epic birthday bash. Among the guests were Samuel L. Jackson, Jennifer Hudson, Jay Z and wife Beyonce, who performed for the First Lady after a speech from the president. But President Obama wasn't all words and no play. Apparently, he hit the huge dance floor and did the dougie in honor of his wife. Watch the video above for more details from the First Lady's 50th b-day bash.