There are at least 8 artists called "X".
These are videos from concerts where X played, so they may be of other bands that played the concert as well.
X / Small Wigs / Skating Polly Dec 4, 2016 Sacramento, California, United States Added by Ska4me
Riot Fest 2013 Sep 14, 2013 Chicago, Illinois, United States Added by Driver 8
X / Pearl Jam Nov 24, 2011 Mexico City, Mexico City, Mexico Added by Egroj
Pearl Jam Twenty / X / Pearl Jam Nov 24, 2011 Mexico City, Mexico City, Mexico Added by Briart Roscoe
All Tomorrow's Parties - ATP 2009 May 15 - 17, 2009 Minehead, England, United Kingdom Added by Maf Daniel