During their November 19 show at the Wiltern in Los Angeles, CA, DragonForce were joined onstage by Arch Enemy’s Alissa White-Gluz for a cover of Taylor Swift’s “Wildest Dreams (Taylor’s Version)” and Amaranthe’s Elize Ryd for a cover of Celine Dion’s “My Heart Will Go On.” You can see fan-filmed footage of that at the…