Jason Derulo is the special guest!! #1989TourDC
— Taylor Swift Updates (@TSwiftOnTour) July 15, 2015
Here's a photo of the two of them! "He took his shirt off for you, how do you feel?" #1989TourDCpic.twitter.com/1dxkHCGrEr
— Taylor Swift Updates (@TSwiftOnTour) July 15, 2015Source 1, 2, 3