Taylor Swift brought Ellie Goulding up on stage with her during her Red Tour stop at L.A.'s Staples Center on Friday night. Following on the heels of surprise guests appearances from the likes of Carly Simon (on "You're So Vain") and Tegan and Sara (on "Closer") at previous shows, Swift joined forces with Goulding for a version of the UK star's 2012 single, "Anything Could Happen."
"Everybody, I want you to put anything you have lit-up up," Swift instructed the crowd during the song, and the audience responded by waving a rainbow of glow-sticks and electronic screens.
"So.. Anything could happen at one of our LA shows," Swift tweeted after the concert. "@elliegoulding showed up to sing 'anything could happen'! 15,000 person dance party.