Erin O'brien has seen concerts during 12 years.

Year   Concerts Seen  
2022 21 concerts
2021 25 concerts
2020 3 concerts
2019 23 concerts
2018 3 concerts
2017 1 concert
2016 6 concerts
2015 1 concert
2014 1 concert
2013 2 concerts
2012 1 concert
2007 1 concert