When the weather begins to heat up, so does festival season -- the time of great music line-ups, a lot of laughs, and more recently, super cool outfits. While you may have your festival ensembles pinned and saved in your phone or already meticulously placed in your closet, one thing you shouldn't overlook is your nails. And when it comes to festival nails, we say, the bolder the better. Because when things get a little muddy and a lot of sweaty, a bold mani somehow makes everything look a bit more put together. From retro florals and tie-dye to mini mushrooms and the perfect touch of glitter, here are the hottest nail art ideas for your...