Fridays, Fashion Styles Jessica Chastain and Rihanna

Oops... even celebrities get it wrong sometimes! We're telling you why Jessica Chastain and Rihanna's fashions fell short in our weekly feature. Learn from the stars' sartorial slip ups!

Jessica Chastain

Jessica Chastain was one of our best dressed at the Oscars and all throughout awards season, but we don't know what she was thinking with this ensemble she chose for the Givenchy show during Paris Fashion Week. The Zero Dark Thirty actress wore a menswear-inspired pair of pants and jacket from Givenchy's Pre-Fall 2013 collection.
The high-waisted trousers are super baggy on Jessica's svelte frame and could use some serious tailoring. They also feature sheer lace panel cutouts, which not only look odd but seem like a wardrobe malfunction waiting to happen. She's made it this far without suffering any overexposures, so why chance it by wearing these cutout pants? You can see she wore shorts underneath, but having to wear both shorts and pants seems silly to us.
The final verdict? You can't win everything all the time and this certainly isn't one of our favorite looks for Jess. We like that she changed up her coif and wore it straight with a center part for a change, though!

Rihanna

Did you know that Rihanna is now a designer as well as a musician? Yep, the "Diamonds" singer has released the Rihanna for River Island Collection, a UK-based fashion line. She celebrated her designer debut during a party at DSTRKT nightclub in London wearing this getup, which gives a whole new meaning to "denim on denim."
She's wearing her own line, but why in the world would anyone rock two pairs of jeans at once?! She seems to be channeling Justin Bieber's saggy pants style with the darker pair of denim that she cuffed. Riri wore a lighter colored pair of jeans underneath and completed the look with high heeled sandals. These retail for $150, and apparently, not everyone agrees with us on these being awful, as they're sold out on the site.
The final verdict? There's really never a reason to wear two pairs of jeans, is there? We think not! Just pick one pair of pants next time, please and thanks! However, her hair and makeup are on point and the crop top shows off her killer abs.