He got his start with an equally unlikely fusion of tough-as-nails trap and candied EDM, and as early fans debated his identity, a co-sign from Skrillex gave singles like 2015’s trance-laced “Find Me” a viral boost. But given the way his music has resonated, he’s clearly the pop star we needed. Marshmello might just be the unlikeliest pop star you could imagine-the anonymous DJ/producer is known only by his cartoonish, marshmallow-shaped mask, with its broad smile and big, sympathetic eyes.