Lovato joked at Sunday's (Aug. 10) show at MetLife Stadium in New Jersey that it "might have been" more than a decade since she and Joe sang together.

In addition to their musical reunion, Lovato and Jonas found time to collaborate on a couple of TikToks that were seemingly filmed backstage, including one in which they lip-synced to fellow Disney star Debby Ryan’s infamous speech about sitting down with the president of the Disney Channel and saying she wanted to make history.