Ari Staprans Leff, known professionally as Lauv, is an American singer, songwriter and record producer based in Los Angeles. Pre-2014: Leff formed his first band Somersault Sunday and released his first single “Say Hello to The Ground”. Leff was known for his basement concerts in his early middle and high school years.Lauv released the single "I'm So Tired..." with Troye Sivan on January 24, 2019.Lauv dated pop musician Julia Michaels for several months in 2018, before they broke up at the end of the year.