T1, E4: The six remaining couples - Natascha and Ryan, Julia and Sheridan, Bri and Chris, Rudi and Matt, Jamie and Trevor, and Savannah and Brandon - survived the first round of musical performances, but another shocking surprise awaits them. They will be switching partners and going on dates with someone in another couple in order to really test their relationships and their all-important chemistry. Will the dates affirm the feelings they have with their current partners or will they decide to change their mate? The drama reaches epic proportions before the couples prepare to hit the stage again with celebrity judges - Bachelor married royalty, Rachel Lindsay and Bryan Abasolo, bestselling recording artist Andy Grammer and GRAMMY Award winner Toni Braxton - ready to weigh in on their musical talent and the chemistry expressed in their performances.