Heather Unbehaun has seen concerts during 17 years.

Year   Concerts Seen  
2015 2 concerts
2013 2 concerts
2012 1 concert
2011 1 concert
2008 2 concerts
2006 1 concert
2005 2 concerts
2004 1 concert
2003 2 concerts
2001 2 concerts
1999 4 concerts
1998 1 concert
1995 4 concerts
1994 1 concert
1993 1 concert
1992 1 concert
1987 2 concerts