I've been to some small weird concerts I hardly remember, and certainly don't remember the names of. These are the ones I do remember:

• Backstreet Girls (NO) @ Oslo Rockefeller
• Blind Guardian @ Oslo Rockefeller
• Bon Jovi @ Oslo Ullevaal Stadium
• DDE (NO) @ Oslo Rockefeller
• Foo Fighters @ Oslo Telenor Arena
• Green Day @ Oslo Spektrum
• Green Day @ Oslo Ullevaal Stadium
• Joan Jett and the Blackhearts @ Oslo Sentrum Scene
• KoRn @ Oslo Youngstorget
• Metallica @ Copenhagen Forum
• Metallica @ Oslo Telenor Arena x2
• Red Hot Chili Peppers @ London Hyde Park
• Red Hot Chili Peppers @ Stockholm Globe Arena
• Rex Rudi (NO) @ Oslo Mono
• Rex Rudi (NO) @ Oslo Deichmanske Library
• Rex Rudi (NO) @ Oslo Mir Café
• Silver (NO) @ Oslo Sub Scene x2
• Timbuktu (SE) @ Oslo Stratos

Opening acts (that I remember):

• Billy Falcon (Bon Jovi @ Oslo Ullevaal Stadium)
• Dunderbeist (NO) (KoRn @ Oslo Youngstorget)
• Joan Jett and the Blackhearts (Green Day @ Oslo Ullevaal Stadium)
• Kvelertak (NO) (Foo Fighters @ Oslo Telenor Arena)
• Lamb of God (Metallica @ Oslo Telenor Arena x2)
• Mastodon (Metallica @ Copenhagen Forum)
• StillWell (KoRn @ Oslo Youngstorget)
• Strongwater (NO) (didn't see the main act @ Lillehammer Felix)
• Vinterbris (NO) (didn't see the main act @ Lillehammer Felix)