Sierra Castillo has seen 18 bands.

Band Concerts Seen
  COIN 2 concerts
  Harry Styles 2 concerts
  5 Seconds of Summer 1 concert
  Bad Suns 1 concert
  Blackstarkids 1 concert
  Blood Orange 1 concert
  Colin's Music 1 concert
  Dayglow 1 concert
  Dress Warm 1 concert
  Gabriels 1 concert
  Holly Humberstone 1 concert
  Inhaler 1 concert
  Olivia Rodrigo 1 concert
  TC Superstar 1 concert
  The 1975 1 concert
  The Moss 1 concert
  The Olson Brothers 1 concert
  Valley 1 concert