The 25-year-old entertainer sang alongside Andy – you can watch the video below!
Taylor also brought out her good friend Serayah to strut the runway during her song “Style.”
“Tonight @andygrammer came to Chicago to sing ‘Honey I’m Good’ and everrrybody knew the words and it was SO MUCH FUN,” Taylor tweeted.
She also wrote, “Later on, when @serayah slayed it on stage singing ‘Style’ with me at Soldier Field in Chicago….”
Taylor Swift Sings With Andy Grammer 7/18/15