Just because they are rich, famous and have extensive access to the hottest designer duds, doesn’t mean that Hollywood’s hottest stars have good taste when it comes to their clothes.

From the glitz and glamour of Paris Fashion Week and the streets of SXSW to the hottest Hollywood events, celebs like Rihanna, Lupita Nyong’o, Sarah Jessica Parker and Katy Perry were dressed to rock and shock this week in haute and not attire.

Find out who were the style winners and sinners in Popdust’s weekly feature.

PHOTOS: Check Out All The Best, Worst And Most Ridiculously Dressed Stars