A lot of effort goes into lighting a concert. Be sure to include this lighting in your images - especially if you are shooting for the concert producer.
Unfortunately, large microphones on stands are still used at some these venues. Omitting these from images is much more challenging. Performers are lit from the front and stand behind the microphones. This means that not only do you have the microphone itself getting in the way of your subject, but you also have a dark shadow on their face.
Camera and Lens Settings
38mm f/2.8 1/320s ISO 800 3840 x 5760px