“Also a huge THANKS to @sydneysierota for performing with me live tonight. :) ???????????? first time we did it!” Zedd wrote after the 18-year-old Echosmith singer hit the stage with him. Check out the video below!
Cody Simpson also performed a set at the annual festival.
“cool day at firefly, played some new tunes just me and the electric then raged haha. Toronto tomorrow yew,” Cody tweeted afterwards.
10+ pics inside of Sydney Sierota and Cody Simpson…