We've been down this road a million times before, but now I really believe that Justin Bieber & Selena Gomez may actually be back together again. At least for one fun night of partying.

It was one of Justin's friend's birthday. So Justin rented out an entire club for the special occasion.

Video footage taken from the party clearly shows Justin & Selena together, side-by-side, just having a blast.

Do you think it will last? Or is it only a once-in-a-while thing between the two now?

Watch the video below for details!