Watch Taylor Swift and Nick Jonas Sing “Jealous”

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Taylor Swift and Nick Jonas performed “Jealous” at the Met Life Stadium in East Rutherford, New Jersey, Saturday night as part of her 1989 world tour. (This time, he didn’t wear a zebra mask.)

The two pop stars go way back:

Oh wow. Time flies when your having fun ha https://t.co/1PChbvLCsY

— Nick Jonas (@nickjonas) July 12, 2015

Unreal feeling jumping on stage with my friend @taylorswift13 tonight at the #1989TourEastRutherford show in my hometown

— Nick Jonas (@nickjonas) July 12, 2015

Swift is known for inviting celebrities to dance on stage with her. During a performance of “Style” that same night, she was joined by Uzo Aduba from Orange Is the New Black and models Candice Swanepoel, Lily Aldridge, Karlie Kloss, Behati Prinsloo and Gigi Hadid. The U.S. women’s soccer team rocked out with her Friday night, fresh from the ticker tape parade celebrating their World Cup win earlier that day in Manhattan.

A Photographic History of Ed Sheeran and Taylor Swift Being BFFs

Ed Sheeran -  At Madison Square Garden Arena - November 1, 2013
Ed Sheeran poses with Taylor Swift backstage before his sold-out show at Madison Square Garden Arena on November 1, 2013 in New York City. Anna Webber—Getty Images
Taylor Swift's RED Tour - London, England - 2/1/14
Taylor Swift was joined on stage by Ed Sheeran as she kicked off the European leg of her blockbuster The RED Tour with the first of five sold-out shows at London's O2 Arena, playing to a capacity crowd of more than 15,500 fans, on February 1, 2014 in London, England.Gareth Cattermole—TAS/Getty Images
Ed Sheeran -  At Madison Square Garden Arena - November 1, 2013
Taylor Swift joins Ed Sheeran on stage at his sold-out show at Madison Square Garden Arena on November 1, 2013 in New York City. Anna Webber—Getty Images
56th GRAMMY Awards - Backstage And Audience
Ed Sheeran and Taylor Swift attend the 56th GRAMMY Awards at Staples Center on January 26, 2014 in Los Angeles, Ca.Kevin Mazur—WireImage/Getty Images
2014 Vanity Fair Oscar Party Hosted By Graydon Carter - Inside
Taylor Swift and Ed Sheeran attend the 2014 Vanity Fair Oscar Party Hosted on March 2, 2014 in West Hollywood, Ca.Kevin Mazur—WireImage/Getty Images
Taylor Swift RED Tour - Detroit, Michigan
Taylor Swift and Ed Sheeran perform onstage at the first of 13 North American stadium dates on The RED Tour at Ford Field in front of a sold-out crowd of more than 48,000 fans on May 4, 2013 in Detroit, Michigan.Christopher Polk—TAS/Getty Images
Taylor Swift, Ed Sheeran
Singers Taylor Swift and Ed Sheeran perform together at Z100's Jingle Ball 2012 at Madison Square Garden on Friday Dec. 7, 2012 in New York City.Evan Agostini—Invision/AP
Taylor Swift's RED Tour - Nashville - 9/21/2013
Ed Sheeran made a special surprise appearance onstage during the finale of the North American portion of Taylor Swift's RED tour. The show played to a crowd of more than 14,000 fans on the final night of three sold-out hometown shows at Nashville's Bridgestone Arena on September 21, 2013. Larry Busacca—TAS/Getty Images

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Write to Olivia B. Waxman at olivia.waxman@time.com