Television News 'The Flash' and 'Supergirl' musical crossover gets premiere date 01/23/2017 The CW's upcoming musical crossover between "The Flash" and "Supergirl" has received an official premiere date. Read More RELATED NEWS Jimmy Fallon's 'The Tonight Show' dropping to only four nights a weekAshley Tisdale announces birth of her second childSelena Gomez is a billionaire TAGS: Melissa Benoist Victor Garber John Barrowman Jeremy Jordan Jesse L. Martin Greg Berlanti Grant Gustin Carlos Valdes Glee The Flash The Flash Supergirl
