Taylor Swift Invites Hayley Kiyoko On Stage to Perform Epic 'Curious' Duet: Watch

 Taylor Swift and Hayley Kiyoko
Kevin Mazur/TAS18/Getty Images for TAS

Taylor Swift and Hayley Kiyoko perform onstage during the Taylor Swift reputation Stadium Tour at Gillette Stadium on July 26, 2018 in Foxborough, Massachusetts. 

Taylor Swift invited rising pop singer Hayley Kiyoko to perform Kiyoko's song "Curious" at Gillette Stadium in Foxborough, M.A. on Thursday night (July 26).

"UM @hayleykiyoko THAT WAS INSANE! Thank you so much for coming to surprise the crowd tonight at @gillettestadium – THAT WAS SO MUCH FUN!!!! So stoked this was your first stadium performance, and you absolutely killed it," Swift later gushed on Instagram.

Swift recently praised Kiyoko for being so open about her sexuality in her music, and defended her from Swifties who took a comment that Kiyoko made about over-sexualizing music out of context.

“We should applaud artists who are brave enough to tell their honest romantic narrative through their art, and the fact is that I’ve never encountered homophobia and she has," Swift said. "It's her right to call out anyone who has double standards about gay vs straight love interests."

Check out Swift and Kiyoko's duet below.