Michelle Obama knows how to strike the perfect balance between sophisticated and sexy. The first lady did just that this week in a white, shoulder-baring Zac Posen dress at BET's "Black Girls Rock" awards show.
Actress Helen Mirren followed the fist lady's sultry lead and donned a sheer and crystal encrusted dress while hitting the town. Add that to the handful of other looks that caught our eye over the past few days and you've got yourself a squad of very stylish stars.
Behold, our favorite looks of the week! Let us know if you agree with our picks in the comments section below.