Over the weekend, Taylor Swift’s 1989 Tour finished the U.S. leg and, of course, a few surprise guests helped close out the night. After consistently bringing out a surprise guest that ties in with each city she’s in (Nelly in St. Louis, Dwyane Wade in Miami and Justin Timberlake in Los Angeles), Swift closed out her Tampa, FL show along with Idina Menzel (to sing “Let It Go”) and Canada’s breakout artist Alessia Cara to perform her debut hit “Here.”

“Wait what happened last night,” Alessia wrote on her Instagram following the Halloween surprise show. And Taylor returned the excitement by tweeting, “I honestly couldn’t be more impressed by @AlessiaCara. 55,000 people and she was absolutely fearless.”

Watch the two singers exchange vocals in the performance clip below.