We Already Had This Week's Best Dressed Star Pegged on Monday

Shailene Woodley cemented her Hollywood star status with Donna Karan Atelier's dramatic red gown at the Madrid premiere of Divergent.

Katy Perry is known for unexpected choices, so we knew there'd have to be a twist with her black Versace Collection gown at MOCA's 35th anniversary gala. Sure enough, a neon yellow lining provided all the surprise we needed!

Kate Beckinsale couldn't be missed in her sexy Jenny Packham gown that featured a mulberry-red hue, side cutouts, and Swarovski crystal trim.

Jennifer Connelly brought April flowers to Noah's Spring showers while wearing Alexander McQueen at the film's London premiere.

Joining her on the red carpet in a markedly minimalist look, Emma Watson was simply stunning in Ralph Lauren Collection.

What other woman? We only had eyes for a Dior-clad Cameron Diaz at her film's Amsterdam premiere.

Cobie Smulders took the plunge in Sportmax's dramatic belted navy gown at the Cinema Society screening of Captain America: The Winter Soldier.

If early looks like Dianna Agron's printed gray dress is proof that Nicolas Ghesquière's debut Louis Vuitton collection is a hit with the stars.

Jessica Paré took a modern turn in her asymmetric green sheath at the season seven premiere of Mad Men.

At The Humane Society Gala, Kate Mara looked at once edgy and sweet in Balenciaga's black-and-white look.