Adele has seen 18 bands.

Band Concerts Seen
  5 Seconds of Summer 2 concerts
  Pierce the Veil 2 concerts
  Twenty One Pilots 2 concerts
  All Time Low 1 concert
  Creeper 1 concert
  Deep Purple 1 concert
  Die Antwoord 1 concert
  Green Day 1 concert
  Jovanotti 1 concert
  letlive. 1 concert
  Muse 1 concert
  One Direction 1 concert
  Panic! At the Disco 1 concert
  Placebo 1 concert
  Prophets of Rage 1 concert
  Puddle of Mudd 1 concert
  Sleeping With Sirens 1 concert
  System of a Down 1 concert