In the photo, posted with a Christmas tree emoji, you see a set with three director's chairs, the initials on each reading "AG", "MC", and "JH". "MC" is definitely Carey, and so that leaves the other two. Most people are guessing there's something in the works with Grande and Hudson, though it's just speculation. Fans spotted Grande's photographer bestie Alfredo Flores retweet Carey's photo (and since unretweeted it), which seems to be a good sign. But can you imagine the incredible energy of those three coming together? Their combined belting power would be enough to end all wars.
As expected, the internet has exploded as people have been reacting to the news and flipping through the other possibilities in their minds. It's the gift that keeps on giving.