‘The Flash’: Grant Gustin Talks ‘Super Friends’ Song Written By ‘Crazy Ex-Girlfriend’ Star Rachel Bloom

Tonight’s musical episode of “The Flash” features a wide variety of songs, but the most upbeat among all of them is probably the tune “Super Friends,” which “Crazy Ex-Girlfriend” star Rachel Bloom co-wrote for the TV special.

In an interview with Entertainment Weekly, Gustin described “Super Friends” and explained how it is different from other songs in the musical.