The 19-year-old actress and singer hit the stage along with Tove Lo, The Weeknd, Zedd, and Chloe Angelides to close out the Jingle Ball tour — and her BFF Bailee Madison just lost her cool over Hailee‘s performance!
“I’M BURSTING WITH HAPPINESS! #y100jingleball @iheartradio @HaileeSteinfeld LOVE YOU HAILEE SO PROUD OF YOU,” Bailee wrote with a short vid on Twitter.
She added later on, “Watching u on stage was a moment I’ll never forget. You my dear friend, are the brightest light. @haileesteinfeld.”
— Bailee Madison (@BaileeMadison) December 19, 2015
35+ pics inside of Hailee Steinfeld, Zedd and more…