Ari Staprans Leff (born August 8, 1994), known professionally as Lauv, is an American singer, songwriter and record producer based in Los Angeles. His debut EP Lost in the Light was released in 2015 and his compilation album I Met You When I Was 18 (The Playlist) was released in 2018. He has written songs for other artists including the singles "Boys" by Charli XCX and "No Promises" by Cheat Codes and Demi Lovato. His debut studio album How I'm Feeling is set to be released on March 6, 2020.