Of course, it can only get romantic to a point when there's a fifth person in the mix. It seemed that everyone made Victoria's Secret model Karlie Kloss feel more than welcome - even if she was the groups "unofficial historian" and tour guide.
Jonas and Swift dated for a hot minute back in 2008 and are clearly ok with being in each others company. They - Gigi included - were spotted having dinner earlier this month as well.
And, of course, Gigi did her part in the girl gang featured heavily in Swift's latest music video extravaganza.