has revealed the insane workout regimen that helped her prepare for her Eras Tour - from running on a treadmill while singing to quitting all .The 33-year-old singer's impressive, three-hour-15-minute concert sees her perform a whopping 44 songs from her decade-long career.Now, the Cruel Summer songstress has opened up about the extreme measures that she took to ensure that she would be in tip top shape for the tour, while speaking to magazine.
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