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Taylor Swift Made Alessia Cara Cry

'Thank you for making me cry.'

After Alessia Cara was brought onstage to perform with Taylor Swift at her Tampa, Florida stop on the 1989 World Tour, Alessia went back to her dressing room to bawl it out because singing in front of 55,000 arm-waving fans is an emotional thing.

And when that was through, Alessia spent the rest of her Halloween night being interviewed by Taylor Swift in a one-on-one interview that has that darling high school AV club feel to it -- probably on purpose -- about her debut album, Know-It-All.

During the chat, which debuted on Yahoo! Wednesday (Nov. 18), Alessia admitted that performing her single "Here" with Tay got her all choked up.

"I went to my dressing room, and I bawled my eyes out. Because of you. So, thank you for making me cry," she admitted to Swift, who, to be fair said, "It was emotional for me, too."

Cara, a 19-year-old Canadian singer-songwriter, was surprised by the fervor surrounding the party-bashing anthem, especially since it's now actually being played at parties, which ... is kind of hilarious.

"If you really think about it, it's such a miserable song for a first single, but I feel like it worked, right? It was different."

Alessia revealed to Swift that her music video for "Here" was art imitating life as closely as possible because she rounded up all her pals that were actually at the "horrible party" that the song is about and put them in the video.

"I thought they were going to be offended, but they were like 'Yes, music video, we support you.' And they waited all day just to film a 10 second scene," Cara explained. "I really wanted to re-create it."

Tay, who is known to wear bedazzled costumes galore on her tour, complimented Alessia for keeping it real with her ripped jeans and leather jacket stage combo and not caving to the importance of image.

"I think it's something that's always been important to me -- the music first," Cara said. "I wanted it to be about the music. So, when I would go around and play for labels ... trying to get signed, I just made it a point to say this is who I am, I dressed the way I would normally dress. And I just wanted to find a label that would accept me for that, so they wouldn't try to mold me into anything."

Cara ultimately signed with Def Jam records, and Know-It-All hit shelves on Nov. 13.