See, the former Gossip Girl star is attending a premiere for hubby Ryan Reynolds' flick Turbo—an animated film about racing insects. So we can only assume Blake's side-stripe Chloé separates are intended to look like the black tie version of an Adidas track suit.
The silver detail and baggy style are a perfect match.
There's standing by your man's career and then there's dressing by your man's career. In this case, the style support went way too far.