There are more than one artist tracked as “TopGunn” on Last.fm. 1. TopGunn (born 3 April 1991 in Copenhagen as Oliver Gammelgaard Nielsen) is a Nørrebro-based Danish dancehall / rnb singer and the owner of Cheff Records label. He is also a produced and has produced beats for artists like Kidd, Raske Penge and Klumben.