Now, neither singers have revealed or confirmed the big news yet, but BOTH of them have hinted to it. Check out the clues we've collected below and see if you think the same thing we do.
That's when Scooter Braun and Justin chimed in and REALLY got people thinkin'...
the musical collaborations taking place in la tonight....wow. beyond excited.- Scooter Braun (@scooterbraun) April 16, 2014
Got some big news coming........- Justin Bieber (@justinbieber) April 17, 2014
Maybe we shouldn't speculate? What do you think? It SO seems possible, right? Hmm...
We wonder what Selena Gomez will think about this too? Bieber DID like to used Ariana to get back at her when they broke up last year.
Until we find out there's a Justin/Ariana duet for sure, check out Ariana's new single here. Feelin' it?