Supergirl Cast Interview + Singing! | Comic-Con 2017 | TVLine

The "Supergirl" cast sings and talks season 3 with Andy Swift at Comic-Con 2017. ► http://bit.ly/TVLineSubscribe http://tvline.com Follow Us On Social Twitter   / michaelausiello  ,   / tvline   Facebook   / tvline   Google+ http://plus.google.com/+TVLine