Justin David Blau was born in Syosset, New York, United States on January 9, 1991 (age 26). Blau grew up around an artistic family, and was soon playing piano, playing guitar and singing. At thirteen, he moved with his family to Las Vegas, Nevada, where he spent the rest of his youth. He attended The Meadows School for high school and Washington University in St. Louis for college.
In 2011, at the age of 20, he vacationed in Sweden, where he discovered electronic dance music. After returning to college he started producing mashups, “mainly because [he] didn’t think anyone was doing a good job.” He soon began mixing under the professional name 3LAU, and by June of that year was uploading mashups to YouTube.
3LAU gained recognition in the electronic music world in 2011 with his two bootlegs, “Girls Who Save the World” and “All Night Long”. He also won a remix competition for his remix of Tiesto’s “Work Hard, Play Hard”.