Watch Taylor Swift surprise a female follower 1:37

(CNN) -- Taylor Swift appeared to defend a spectator inside the crowd of one of her concerts at the final "Eras Tour" stop in Philadelphia on Saturday, and videos of the moment circulate on social media.

Videos of the show at Lincoln Financial Field showed Swift interrupting her 2014 hit "Bad Blood" to defend a person in the crowd.

"She's fine," Swift is first heard shouting in the crowd, noticeably disturbed by what she had seen. He paused again to say, "She wasn't doing anything," before yelling, "Hey, stop," two more times.

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It's unclear from the videos what happened in the crowd to provoke the reaction, but Swift is seen picking up on "Bad Blood," perhaps a song suitable for the moment, without problems shortly after the interruption.

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CNN reached out to Lincoln Financial Field and a Swift representative for comment.

Saturday's show wasn't entirely filled with "bad blood." Other videos on social media appear to show thousands of ticketless Swift fans gathered outside the outdoor stadium to sing from afar during the show in a healthy show of support for her "Anti-Hero."

The singer will head to Massachusetts next weekend after her third and final show in Philadelphia on Sunday. The "Eras Tour" is Swift's first tour in five years and kicked off in March in Glendale, Arizona.

Taylor Swift