There are reports that Sel did NOT want to feature in the mini film, but that she will have a small role now. Taylor's posted several Instagram pictures online hinting to her friends' alter egos, and so far nothing has been posted for Sel.
"There have been a few surprises that were filmed. However, only Taylor and a few other people are aware of them. At this moment, it seems as though Selena filmed a part for the video," a source told HollywoodLife.com.
"Taylor asked Selena to be a part of the video and Selena's schedule originally had her being unable to do it, but many in Taylor's camp think that they worked it out and that Selena will be one of the non-announced surprises!"
We'll probably have to wait until Sunday to see. Tay's unveiling the video that night at the Billboard Music Awards!
Check out who we KNOW is going to be a part of "Bad Blood" below.