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‘Supergirl’ Star Melissa Benoist on the Challenges of Filming the Arrowverse Musical Crossover

The CW’s Arrowverse shows certainly are no stranger to crossover episodes, but it sounds like one of them came with an interesting amount of baggage. On a recent appearance on Popcorn with Peter Travers, Supergirl star Melissa Benoist addressed the show’s 2017 musical crossover episode with The Flash, “Duet”. While Benoist and The Flash’s Grant …