I always wore California T-shirts, and then I thought I was too old for some reason
Priyanka by Eva Lendel a modern guipure lace gown with cold-shoulder sleeves and corset back that captures the dramatic sensuality of Olivia Atwoods wedding dress
We`ve crafted this vanilla-colored set from premium materials such as silk, silk organza, and vintage French lace
Fiber-Optic Festival Dress White Built for Weddings, galas, and upscale events VIP nights and private parties Red-carpet and photo moments Unforgettable entrances Special occasions that deserve more than ordinary What it does 16 million colors , app-controlled from your phone Sound-reactive modes that pulse with the music Squad-sync connect up to 7 YMYW pieces Removable battery swaps in seconds, 8+ hours of glow Handmade and built to last season after season Specs Colors: 16 million RGB, dimmable Control: App-controlled (iOS + Android) Sound reactive: Yes Sync: Up to 7 YMYW pieces Battery: Removable, 8+ hours of glow Care: Hand-washable (remove the battery module first) Sizes: See size chart Designed by: Your Mind Your World California Why YMYW Your Mind Your World has been designing light-up festival fashion for over a decade

In this case, they may have a super specific attire rules to ensure she stands out such as flipping tradition and having attendees wear white (see: Christines famous wedding from Selling Sunset !)
What you wear underneath counts and it doesn't always have to be a slip dress