The Flash and Supergirl Go Old Hollywood in First Musical Crossover Trailer

The Flash and Supergirl are going to Old Hollywood in the first trailer for their upcoming musical crossover.

When the villainous Music Meister (Darren Criss) puts Kara (Melissa Benoist) in a coma at the end of Supergirl (Monday, March 20 at 8/7c), her friends travel to Central City to seek help

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• The Flash
• Supergirl
• Melissa Benoist
• Grant Gustin

Source TVGuide.com: Breaking News http://ift.tt/2naWRNT