There are at least 8 artists called "X".
These are photos from concerts where X played, so they may be of other bands that played the concert as well.
X / The Heartache State with Nick Barker Sep 23, 2017 St Kilda, Victoria, Australia Uploaded by Righteyemedia
X Sep 20, 2017 Kansas City, Missouri, United States Uploaded by Felice + David Silverman
Riot Fest 2017 Sep 15 - 17, 2017 Chicago, Illinois, United States Uploaded by Craig Mac