04/06/2012 11:38 am ET

The Week's Best Style Moments: Michelle Obama, Rachel Roy, Rihanna And More (PHOTOS)

There were a number of looks that caught our eye this week...

Michelle Obama showed us that even the First Lady can rock a pair of skinny jeans, Rihanna wore pajamas on the red carpet (well, kind of) and pulled it off fabulously and designer Rachel Roy was effortlessly chic (per usual) in an eye-catching floral print skirt.

Check out those stylish ladies and more of the week's best looks in the slideshow below. Who do you think was best-dressed?