The Jonas Brothers star took to Instagram on Wednesday, December 04 to share footage of himself performing to the tune for his sibling. In the video, the 30-year-old puts his own spin on the track, replacing the word "lover" with "brother," and crooning, "You're my... my... brother."
Nick Jonas feigns indifference, staring at his phone as Joe sings to him.
Jonas and Swift dated in 2008 and she famously outed him for dumping her over the phone.