There have been several artists that have used the name Phoenix, the two best known are an alternative rock band from France and a folk rock band from Romania.
These are photos from concerts where Phoenix played, so they may be of other bands that played the concert as well.
T In The Park Jul 9, 2006 Kinross, United Kingdom Uploaded by Neil Macdonald
T In The Park 2006 Jul 8 - 9, 2006 Kinross, Scotland, United Kingdom Uploaded by Theshredder84