Regan Tamanui is a self-taught artist who began exhibiting his work in public spaces under the pseudonym 'HA-HA' since 2002 . He is now known as one of the founders of the stencil art movement internationally, and his work has been presented in public, private and commercial galleries across the globe. Within his work, HA-HA explores the power of mass media within Australian popular culture, the reality TV phenomena, the religion of sport and the new virtues of the 21st century.

By using multi-layered stencils of up to 40 layers HA-HA’s work is a reflection of popular culture. He sources reference material directly from the newspaper, or by photographing the subject to tell a story of the here & now. Without the aid of a computer, his stencil cutting technique produces life-like imagery. His work has been included in major exhibitions, including Space Invaders (2007) the National Gallery of Australia and Contemporary Australian Optimism (2008) GOMA. Another proponent of his practice has involved presenting numerous Stencil Art workshops, as well collaborations with Townsville Regional Arts QLD among others.

HA-HA has been the recipient of international artist residencies including, La Martine, France, Saigon Outcast, Vietnam, and the Australian International School in Singapore. He has been a finalist in a number of national prizes, and his work can be found in the collection of the National Gallery of Australia, BHP Billiton, the State Library of Victoria, City of Melbourne and Artbank, as well as private collections across Australia, New Zealand, The United Kingdom & The United States of America.