04/03/2015 08:55 am ET | Updated Apr 04, 2015

Michelle Obama Wows In A Sexy Dress And More Wins On This Week's Best-Dressed List

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.

  • Michelle Obama in Zac Posen and Jimmy Choo
    It's no surprise that FLOTUS landed on our list this week after stepping out in a white hot frock. The stunning design served up some extra sex appeal thanks to the figure-flattering bustier. And the off-the-shoulder silhouette showed off Mrs. Obama's famous toned arms.
  • Jennifer Lopez in Jennifer Lopez Collection for Kohl's
    The fact that J.Lo is rocking an outfit (sans her Giuseppe Zanotti sandals) that retails for under $100 truly makes our hearts sing. Paired with her glowing skin and gorgeous gams, she looks like a million bucks.
  • Helen Mirren in Badgley Mischka
    Leave it to Dame Mirren to provide us with some razzle dazzle this week. The actress turned heads in a navy sheath dress adorned with crystals that can described in one word: stunning.
  • Jamie Chung in Mason by Michelle Mason
    This effortlessly sexy dress is going to the top of our must-have list. The relaxed fit, poppy red hue and high slit with a bit of lace peeking out is a winning combination. Plus teaming the look with a nude sandal helps to elongate the look of the legs in this tea-length design.
  • Kerry Washington in Giambattista Valli
    Although there's a lot going on with this mixed media dress -- an embellished bodice, floral embrodiered skirt and lacy Bionda Castana heels -- the "Scandal" star isn't overwhelmed by the design. She's pulling it off like a boss.
  • Millie Mackintosh
    While we will forever love a LBD, the British socialite and reality TV star makes a strong case for the silver wrap dress. You'll just need some double-stick tape for that plunging neckline.
  • Nick Jonas in Valentino
    Mr. Jonas has been stealing the spotlight away from the ladies lately. After impressing us with his accessorizing skills at the Brit Awards, the singer is now showing off his sartorial prowess in a red-and-black plaid suit from the Fall 2015 Valentino collection.
  • Tracee Ellis Ross in Bibhu Mohapatra
    The apple doesn't fall too far from the tree -- and what a fabulous tree Ms. Ross gets to fall from. The "Blackish" actress channeled her glamorous mother, Diana Ross, while attending the "Black Girls Rock" show. The simple white, asymmetrical gown was nothing but retro chic.

Our Favorite Looks Of 2015