Nikki Zimmerman has seen concerts during 12 years.

Year   Concerts Seen  
2023 2 concerts
2022 10 concerts
2021 9 concerts
2020 1 concert
2019 5 concerts
2018 3 concerts
2017 1 concert
2016 6 concerts
2015 4 concerts
2014 1 concert
2009 1 concert
2007 1 concert