Marshmello is an American electronic music producer and DJ known for his distinctive sound and signature marshmallow-shaped helmet. He gained popularity in the mid-2010s with hit songs like "Alone," "Happier," and "Friends." His music often blends elements of future bass and pop, appealing to a wide audience. In addition to his music career, Marshmello is recognized for his engaging online presence, particularly on platforms like YouTube and Twitch. He often collaborates with other artists and has worked with notable names such as Selena Gomez and Bastille. His unique brand and catchy tunes have made him a prominent figure in the electronic dance music scene.