100 cotton midi dress Fiona 100% Demin Blue Denim Blue / S neckline with a self Time and Tru Women's Sleeveless

Advertisement - Continue Reading Below 15 Katy Perry as a Christmas Tree Getty Images When Katy emerged onto the Camden, New Jersey Jingle Ball stage in 2008 decked out in this , she put down roots as an official holiday costume connoisseur

If you want the postcard Miami club night with bottle service and a real shot at a celebrity sighting, this is the room

Wearing above theses suede mules (size down half a size if in between sizes), this silk cashmere sweater that is so versatile (size L) and this on trend shoulder bag

It is generally best to avoid white shoes, as they can look too stark, and casual brown leather, which often clashes with the formality of black evening wear