“Ari’s #1 in 80 countries! So great when good things happen to good people,” he wrote, along with a photo of her album cover. “I’m more than proud of you@arianagrande n grateful to be apart of it!”
Romance reports began earlier this month, when the pair released their collaboration “Best Mistake” — they reportedly got close while working on the track together. Speculation hit a new high, though, at Sunday’s Video Music Awards, when they were caught holding hands on a backstage camera!