18. The Makeup-Setting Spray — After spending a ton of time crafting the perfect party makeup, there's nothing more frustrating than watching it all slide off or fade away before your party has even begun. Preserve your hard work and keep your fete face in place with a setting spray — it will lock in your look and keep it from smudging and slipping off.

Urban Decay All Nighter Long Lasting Setting Spray, $29, available at Macy's; E.L.F. Makeup Mist & Set, $3, available at Target.