If President Barack Obama is the block, then Michelle Obama is the light that keeps the streets on 1600 Pennsylvania Avenue on. As the most modern First Lady to occupy the throne to date, the toned and trim mother of 2 has done more than just make jaws drop in J. Crew threads and Alexander Wang gowns. Through her fitness initiatives, she has kept everyone moving, from Beyoncé to Jimmy Fallon, and still finds time to deliver flawless*** interviews, pow wow with Oprah and keep the First Family in check. To honor her 50th born day (January 17), here are 15 reasons why M.O is the real HBIC (Head-Boss-In-Charge) of the White House.