Taylor Swift Shares Nostalgic Picture With Nick Jonas

Jun Sato/Getty Images for TS
Taylor Swift performs during The 1989 World Tour at Tokyo Dome at Tokyo Dome on May 6, 2015 in Tokyo, Japan. 

Taylor Swift and Nick Jonas paired up for an unexpected performance of “Jealous” at Swift’s second 1989 World Tour show in East Rutherford, N.J., on Saturday, July 11. But, as it turns out, this wasn’t the first time they’ve shared the stage.

Watch Taylor Swift and Nick Jonas Sing 'Jealous' at New Jersey Concert

On July 12, Swift posted a shot of them from several years ago, side-by-side with a picture from Saturday night’s concert at MetLife Stadium.

“I feel all the feelings now,” Swift captioned the image -- and Jonas pretty much agreed. His response: “Oh wow. Time flies when you’re having fun ha.”

The picture appears to be from Swift’s performance of “Should’ve Said No” -- the fifth single from her self-titled debut album, released in 2008 -- with the Jonas Brothers that was captured for the band’s 2009 concert movie, Jonas Brothers: The 3D Concert Experience. Watch a (somewhat shaky) fan-filmed clip of that sentimental live performance below to “feel all the feelings” along with them: