DC Superhero Girls Supergirl custom birthday shirt
Supergirl Comic Box Commentary: Happy Birthday Supergirl! Now Let's Get Snubbed!
Happy birthday, Kara Zor-El! 🎂🎉 : r/Supergirl
Sterling Gates on Twitter: "Happy birthday, #Supergirl! You've changed so many lives for the better -- including my own -- and we're all dang thankful you exist. https://t.co/I3IDxbP4lz" / Twitter