VIDEO: Melissa Benoist Sings 'Moon River' on 'Supergirl/Flash' Crossover!

Melissa Benoist doesn’t miss a note in this clip from the Supergirl and The Flash crossover, airing tomorrow night.

The actress sings “Moon River” in the video below (via Vulture), knowing that she doesn’t belong there at all in the 1940s themed club, where Barry Allen (Grant Gustin) just pops in at.

Elsewhere in Supergirl‘s episode, Kara is put on high alert when a new villain (Teri Hatcher) comes to National City; and Winn’s (Jeremy Jordan) girlfriend, Lyra (Tamzin Merchant), gets Winn in trouble with the law.

Tune in on Monday night, starting @ 8PM ET/PT on The CW! Click inside to watch the clip NOW!