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 / Sean Wheeler & Zander Schloss / Black Tibetans Dec 29, 2011 Sacramento, California, United States Uploaded by Sactoslacker
X / Pearl Jam Nov 24, 2011 Mexico City, Mexico City, Mexico Uploaded by Jayme Muñoz
X / Pearl Jam Nov 24, 2011 Mexico City, Mexico City, Mexico Uploaded by Egroj
X / Pearl Jam Nov 24, 2011 Mexico City, Mexico City, Mexico Uploaded by Roberto Moreno
Voodoo Music Experience 2011 Oct 28 - 30, 2011 New Orleans, Louisiana, United States Uploaded by Josh5180
Voodoo Music Experience 2011 Oct 28 - 30, 2011 New Orleans, Louisiana, United States Uploaded by Thekilburnoracle