I t's been a year since Taylor Swift’s iconic The Eras Tour and the internet still hasn’t fully recovered. The cultural juggernaut was less of a concert series and more of an

The iHeartRadio Awards played a "Folklore" surprise song from Taylor Swift's first tour date in Arizona two years ago.

As a bonus, Swift released never-before-seen footage of her performance of "Mirrorball" on opening night of the Eras Tour in Glendale, Arizona. The Eras Tour kicked off two years ago on St. Patrick's Day, and "Mirrorball" — from her Evermore album — was one of two surprise songs performed that first night.