Indie pop band Echosmith will headline the 2019 Stanley Cup Final concert and viewing party on Market Street in St. Louis before Game 3 on Saturday, June 1, the St. Louis Blues and the National Hockey League (NHL) announced today. The sibling trio from Southern California will take the outdoor stage in the 2019 Stanley Cup Final Party at 5:30 p.m. CT before the Blues face the Boston Bruins at Enterprise Center at 7 p.m. CT (NBCSN).