3LAU (pronounced "Blau"), born Justin Blau, is an American DJ, producer, and music-technology entrepreneur who has become one of the most influential figures at the intersection of electronic dance music and Web3. Born and raised in Las Vegas, 3LAU discovered dance music during a trip to Europe as a teenager and began producing electronic tracks while studying at Washington University in St. Louis, where he earned a degree in business — a background that would later shape his role as one of dance music's most business-forward artists.

His breakthrough came in the early 2010s with a string of viral bootleg mashups and original tracks that quickly earned support from major EDM tastemakers, followed by breakout singles including "How You Love Me" with Bright Lights, "Is It Love" with Yeah Boy, "Star Crossed," "Better with You," and "On My Mind" with Yeah Boy. The tracks helped establish 3LAU as one of the defining voices of the melodic progressive house and big-room EDM movement, earning millions of streams and radio play across the world.