Taylor Swift continued her concert tradition on Saturday night of bringing special guests up on stage to surprise fans.
But this one involved a twist.
The evening after honoring the U.S. Women's National Team, Swift called upon ex-boyfriend Nick Jonas to join her for a duet of the track "Jealous."
And those in attendance at MetLife Stadium in East Rutherford went crazy for the performance, as you can see above.
Swift and Jonas dated many years ago, but are now on great terms. He was in attendance (along with girlfriend Gigi Hadid) at Swift's July Fourth party a week earlier.
While performing “Style” at the same July 11 show, meanwhile, Swift had Orange Is The New Black actress Uzo Aduba walk on by, along with models Behati Prinsloo, Candice Swanepoel, Hadid, Martha Hunt, Karlie Kloss and Lily Aldridge.
She has made it her trademark to have celebrities appear at concerts, with other recent stars to make a cameo including Kendall Jenner, Serena Williams and Mariska Hargitay.