There are at least three bands with the name "Teenager."
These are photos from concerts where Teenager played, so they may be of other bands that played the concert as well.
Splendour in the Grass Festival 2007 Aug 4 - 5, 2007 Gold Coast, Queensland, Australia Uploaded by Burraga
Come Together 2006 Jun 11, 2006 Milsons Point, New South Wales, Australia Uploaded by Andy J Ryan