You will need to bring money, a SMALL purse or a backpack (you don't want to be slowed down by a heavy purse or back pack) and I would recommend a water bottle because if you sing along you are going to need water. Concerts usually have a bar as well but there might be a long line(same with the merch table) so bringing your own will help. You might get searched before the concert on the way in so water bottles might not be allowed as well as phones and cameras. Most concert venues allow phones but some don't so I would recommend bringing it and if they don't just put it back in the vehicle you came in.