As part of his acclaimed first solo museum exhibition, the large-scale altar-like installation 2012–2555, Korakrit Arunanondchai, 27, rapped alongside his e-cigarette-smoking Bangkok friends in matching denim outfits at MoMA PS1. On top of his flamboyant rock-star looks, the young US-based artist bleaches and burns denim and uses it as a canvas, body paints, performs and shoots videos—and it’s hard to predict what he will do next.