There are at least two bands with the name Chicks:
These are photos from concerts where Chicks played, so they may be of other bands that played the concert as well.
Glastonbury Festival 1999 Jun 25 - 27, 1999 Shepton Mallet, England, United Kingdom Uploaded by Sunsetyellow
Ash / Idlewild / Chicks Dec 23, 1998 Belfast, Northern Ireland, United Kingdom Uploaded by Paul Clarke