Following the immunity loss of the Infant Sorrow tribe, Tim returned to camp and immediately pulled out his hidden immunity idol he had found previously and never used. Since it was known that any merge idols that were found would become void at the final 10, Tim explained that he was going to openly wear his idol to tribal council and would be playing it on himself. Right away after this, Katy pulled out HER immunity idol that SHE found, pretty much countering what Tim said by saying that she, too, would be doing the same thing. This shocking turn of events pretty much made it clear to Marshall and Robyn: one of them would be definitely going. Marshall spoke with Tim, and he assured him that he had his back, since he wasn't about to keep Robyn in over him and help out the females from the merge alliance. Likewise, Katy said she wouldn't betray Robyn when she asked her the same thing. This seemed like it was going to create a first-ever event in tribal council.
Upon entering tribal council, both Katy and Tim continued to say that they would be playing their idols on themselves, and both singers made it clear that they would not be voting against the person the other was voting for. In other words, Katy was not voting for Robyn, and Tim was not voting for Marshall. When the vote came, it happened exactly the way everyone anticipated. Marshall and Robyn both tied in votes 2-2, and both Katy and Tim played their idols on themselves. A re-vote occurred, just to make it official, but it remained a 1-1 tie. This would in turn lead to a very unusual rule coming into play. Normally, after two straight ties, those in the tied vote would be given immunity and everyone else would have to draw rocks. However, in this case, both Katy and Tim played idols. So, when idols were in play and there was a tied vote, the idols overruled the tie. Therefore, Katy and Tim remained immune, and Marshall and Robyn instead had to draw rocks. Each one drew one of the two rocks out of the bag, and when it came for the reveal, Robyn had the black rock and Marshall had the white rock. This caused Robyn to be eliminated from the game and sent to the jury due to drawing rocks.
Following Rihanna leaving the game, the final ten were then randomly separated into the final two tribes of the game. It was explained that these would be the last two tribes for the whole game, and would only result in a final merge if one tribe got down to a single player. This meant that the final four COULD potentially be 2 versus 2, and whichever tribe won the final immunity challenge would automatically make up the final two, and the other two would have to do a tie-breaker challenge to make the end. Also, two new idols would be put into the game, one on each side, and those would be the only ones for the remainder of the game.
Anaconda Tribe:
Harry Styles (One Direction)
Justin Bieber
Marshall Mathers (Eminem)
Onika Maraj (Nicki Minaj)
Tim Bergling (Avicii)
Dark Horse Tribe:
Beyoncé Knowles
Katheryn Hudson (Katy Perry)
Miley Cyrus
Stefani Germanotta (Lady Gaga)
Taylor Swift
The first immunity challenge with the final ten being separated into tribes of two (which Nicki and Katy both demanded be named after their most famous songs), Justin proved to continue being a good luck charm as his tribe won once more. This sent the Dark Horse tribe right to tribal council.