Monsta is a name of at least four artists:
These are photos from concerts where Monsta played, so they may be of other bands that played the concert as well.
Future Music Festival 2014 Mar 9, 2014 Melbourne, Victoria, Australia Uploaded by Jarrod Bunker
V Festival 2013 Aug 17 - 18, 2013 Chelmsford, England, United Kingdom Uploaded by Peter
Kendal Calling 2013 Jul 26 - 28, 2013 Pentrich, UK Uploaded by Maf Daniel
Knife Party / Zedd / Breakage / Monsta Feb 2, 2013 Bournemouth, England, United Kingdom Uploaded by Dan Delaney
