You might want to take a seat for this one because it looks like Mariah Carey and Justin Bieber may be joining forces once again! The 45-year-old songstress took to Instagram on Thursday and got us all excited when she posted a photo of her with Justin Bieber, French Montana, and music producer Eric Hudson in what looks to be a recording studio. Mariah captioned the photo, "#comingsoon @frenchmontana @ehudmusic @joeyarbagey @justinbieber," leading us to believe she and Justin are working on music together. We must admit, we're majorly excited! Mariah and Justin previously collaborated in 2011 [1], when they released a duet of "All I Want For Christmas Is You." Keep reading to see her post below, and then check out Mariah and Katy Perry hanging out in Las Vegas [2] and the Mariah and 98 Degrees flashback photo [3] that will have you missing the '90s.