Kara Will Sing at Barry & Iris' Wedding Tonight on During 'Crisis on Earth-X' Crossover

Kara (Melissa Benoist) will be showing off her gorgeous singing voice tonight on Supergirl!

In the first part of the Arrowverse crossover, Crisis on Earth-X, Kara will be singing song during Barry (Grant Gustin) and Iris’s (Candice Patton) wedding tonight — although what song it is still remains a mystery.

Before the villains from Earth-X attack the ceremony, we’ll also see a rehearsal dinner with all your faves that also includes some over-indulgence.

According to TVGuide, “some fights are had, and most importantly, some souls are bared during the speech section of the evening.”

“Crisis on Earth-X, Part 1″ airs TONIGHT @ 8PM ET/PT on The CW. Stay tuned for what’s happening in hour two!