Getty ImagesWe've got two Jessicas in our roundup of best looks this week, so let's start with the first: Jessica Alba.
The chic mom was perfection in a bright red dress by Preen that showed just a sliver of skin at the waist. Romantic waves and a matching crimson lip completed the look.
Another Jessica who nailed it on the red carpet? Jessica Biel. The star looked fresh-faced at the Tiffany & Co. opening in Paris, wearing a Giambattista Valli mini dress that she accessorized with plenty of diamonds.
Once Upon a Time actress Jennifer Morrison looked like a princess in a mint-colored Georges Hobeika gown and milkmaid braids while in Monte Carlo. Another hit of the week: Allison Williams, who must have weddings on the brain, because she looked like a blushing bride in a white lace Dolce & Gabbana gown.
And finally, we've got to hand it to Rose Byrne, for taking a risk in a glittering Max Mara jumpsuit at the Women in Film 2014 Crystal + Lucy Awards. We have a feeling this'll be a polarizing look, but we give Rose props for thinking differently.