Taylor Swift is about to begin her Eras Tour in the newly entitled Swift City (Glendale), Arizona.Fans' excitement and speculation about the tour, her first in five years, is through the roof. Will we catch a rare glimpse of Taylor's boyfriend Joe Alwyn? What surprise celebrity guests might appear (Ryan Reynolds, Blake Lively... Harry Styles?!)? Taylor Swift performing during her Reputation tour in 2018But perhaps the biggest source of stress is whether the singer will be able to perform everyone's favorite hits on the night.