For all the ONCE who are wondering what to wear at a concert, you can also get some inspiration from the girls! A pleated mini skirt or shorts with a cropped top or halter neck and a piece of layering such as an oversized shirt or a cardigan can do. You can add some fun elements to the attire, such as belts, berets, caps, or even chokers. A mini dress or an A-line dress with an underlayer or an overlayer also works as a good concert outfit.