Think of Beyonce's "I woke up like this" and that's what I mean by the "un-do". Perfectly pretty hair for prom or any formal event for that matter, that looks undone and effortless. We get asked ALL the time about how we think hair should be done with a specific dress so it's only fitting we share some of our favorite looks for prom hair ideas. PS, did we just coin the phrase "Un-do"???