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.
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