She took to Twitter to tell her fans that she had left a 'little package' hidden behind a book in Dunedin City Library, and posted a picture of the scene.
Fans rushed to try get there first, but one with the handle @EmJUson found the tickets to the concert that night along with a hand-drawn t-shirt by Lorde.
The singer has achieved massive success for her age with her sophomore album Melodrama achieving huge commercial and critical success following its release this Summer.
She has already been confirmed for All Points East festival taking place in London this Summer.