Ahlgren has seen 135 bands.

Band Concerts Seen
  Bush 4 concerts
  Celtic Woman 4 concerts
  Alice In Chains 3 concerts
  Breaking Benjamin 3 concerts
  Five Finger Death Punch 3 concerts
  Godsmack 3 concerts
  Halestorm 3 concerts
  Live 3 concerts
  Metallica 3 concerts
  Nothing More 3 concerts
  Shinedown 3 concerts
  The Hu 3 concerts
  The Struts 3 concerts
  Three Days Grace 3 concerts
  Bad Wolves 2 concerts
  Brit Floyd 2 concerts
  Candlebox 2 concerts
  Ceramic Animal 2 concerts
  Clutch 2 concerts
  Dave Matthews Band 2 concerts
  Disturbed 2 concerts
  Dorothy 2 concerts
  Evanescence 2 concerts
  Ghost 2 concerts
  In This Moment 2 concerts