During the opening act, I thought she wouldn't fill the arena. Not even 50% of the seats were filled. However, as the clock ticked and she turned up on stage, every seat was packed! If it wasn't completely sold out, I'd say at least 90% was.
During her closing speech, after 'Halo', she kept repeating "see you next time" so I am already looking forward for her to come back

The last time she was in Norway was during
The Beyoncé Experience though, so it could be a while
And I probably saw 20 girls pass out or being escorted out of the arena. King ha presence.