Instagram is always a great place to see who is working with who in the music industry. A quick glance over any musicians Instagram you're sure to come across some of your favorite artists pictured working together. PartyNextDoor posted on Instagram a photo of him and Post Malone. Where are they? Is it a studio? Or did they simply cross paths and catch a photo op. No one knows for sure, but what makes us all fans is the speculation of what could be, or what's to come. 

The two are no strangers to working with one another. The two linked up for "Touchdown" and most recently "Demons." Only time will tell if new music is on the way from the two, or this was just a casual encounter amongst stars.