Justin Bieber and Ariana Grande have teased a collaboration before, but now there's visual proof that the pair of pop superstars have spent studio time together. On Thursday night (May 1), the Biebs posted an Instagram photo of himself standing next to Grande's unmistakable ponytail.
"congrats @arianagrande on your number 1 song. #arianabieberduet ??" Bieber posted as a super-sneaky caption. The photo finds Bieber looking particularly emotional in the studio -- perhaps the upcoming collaboration is just that moving?