Now we know what you're thinking, and don't worry, this isn't the same thing as the fanny packs you see people wearing in amusement parks. A money belt looks a lot like a fanny pack, but it's thinner so you can wear it under your clothes. No one will ever know it's there!
If you don't want to deal with a purse, a money belt is a perfect way to carry around the basic essentials you'll need during the concert. Even if you do take a purse, it never hurts to wear a money belt as well, so that way you can keep your ID and some extra cash in there in case someone takes your bag.