It’s nice to have a friend, and Taylor Swift has plenty of famous pals that have been supporting her on her massive The Eras tour, which kicked off on March 17 in Glendale, Ariz.
Besides friends like HAIM, Laura Dern, Emma Stone and Shania Twain watching from the crowd and singing along to every word, Swift also surprised fans with onstage appearances. Despite telling fans during night one at Las Vegas’ Allegiant Stadium that “we don’t have guests at this show,” the pop superstar invited the Mumford & Sons frontman for her debut live performance of “Cowboy Like Me,” from Swift’s…