They are several artists named "Walk the Moon";
These are photos from concerts where Walk the Moon played, so they may be of other bands that played the concert as well.
Bunbury Festival 2013 Jul 12 - 14, 2013 Cincinnati, Ohio, United States Uploaded by Angee Kv
Bonnaroo Music & Arts Festival 2013 Jun 13 - 16, 2013 Manchester, Tennessee, United States Uploaded by Josh5180