Courtesy is the stage name of Najaaraq Vestbirk, a Greenland-born, Danish DJ, producer, and label founder based in Berlin. Renowned for her high-energy, emotionally resonant sets, she has become a pivotal figure in Copenhagen's fast-paced techno scene and a global ambassador for its distinctive sound.

Courtesy's DJ sets are characterized by a blend of fast techno, ambient trance, and experimental sounds, often infused with euphoric and melancholic elements. She is known for her ability to create immersive sonic experiences that resonate deeply with audiences. Her performances at venues like Berghain, Tresor, and festivals such as Sonar and Primavera have solidified her reputation as a dynamic and innovative artist.