Watch Taylor Swift, Camila Cabello and Charli XCX Perform 'Shake It Off' on the Opening Night of the 'Reputation' Tour

Taylor Swift invited a few friends to shake it off during her first tour stop.

Swift's Reputation tour began on Tuesday night (May 8) at the University of Phoenix stadium in Glendale, AZ.

Charli XCX and Camila Cabello were the openers for Swift, but they weren't done singing when their sets were over.

Midway through Swift's concert, Taylor welcomed Charli XCX and Cabello back onstage for a rousing rendition of "Shake It Off."

Watch clips from social media below: