Flash/Supergirl Musical Crossover Date

Variety has revealed that the upcoming musical crossover of Supergirl and The Flash will take place on March 20 and 21. The crossover will start at the end of the Supergirl episode, with the singing taking place in the Flash episode (titled Duet, directed by Dermott Downs). Grant Gustin, Melissa Benoist, Jesse L. Martin, Victor Garber, Carlos Valdes, Jeremy Jordan, and John Barrowman will all have musical performances.