Shawn Mendes says he doesn't trust Taylor Swift's boyfriend Joe Alwyn because his eyes are too blue

• Shawn Mendes recently took a lie detector test in a video for Vanity Fair.

• The "Wonder" singer said he thinks Taylor Swift's boyfriend, Joe Alwyn, has a "villain look."

• "He's got really blue eyes and I struggle with eyes that blue. I find it easier to trust brown eyes."

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Shawn Mendes recently opened up about his friendship with Taylor Swift - and his suspicious impression of her boyfriend, Joe Alwyn, whom he's never met.

While taking a lie detector test in a new video for Vanity Fair, Mendes was asked whether he still keeps in touch with his early mentor. The "Stitches" crooner was one of the opening acts for Swift's "1989" tour in 2014. He also made a cameo during the Pasadena stop on her 2018 "Reputation" tour.

"I always am asking her for advice on music," Mendes said, adding that he last texted Swift "maybe a month ago."

He was then asked whether he "approves" of Swift's longtime boyfriend, whom she apparently began dating in 2016.

"I've never personally met Joe, but he looks like a sweet guy," Mendes said.

When the polygraph examiner told Mendes he was being "deceptive," the singer immediately changed course.

"I'm lying? A little bit? Yeah, I mean, he's kind of got a little bit of a villain look about him," Mendes said, holding up a photo of Alwyn. "I mean, he looks like a nice guy - but he, at any movement, could turn into a villain."

"He's got really blue eyes and I struggle with eyes that blue," he added. "I find it easier to trust brown eyes."

Mendes did not elaborate on his suspicion of Alwyn, but did say he felt he'd "talked way too much about him."

Earlier in the video, Mendes told the interviewer that he's "pretty bad at lying" - although he admitted to lying in the past, including to his girlfriend, Camila Cabello.

Cabello is also friends with Swift and served as one of her opening acts for the "Reputation" tour. Cabello even performed "Shake It Off" alongside Swift and Halsey at the 2019 American Music Awards, where Swift was honored as artist of the decade.

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