We had a disagreement in this house, but I really think Bikini Girl did NOT know Cara would appear. That is why Cara made sure to put a loving arm around her at first, before she actually proved she can sing and dance better.
I think that if Bikini Girl had known this would happen, she would have feigned shock — she did not, she was too stunned. She would have tried to outdo Cara, but she did not. She totally froze for the rest of the song. I think they sprung it on her and it was very entertaining. Cara went up in my estimation a little for doing it!
I agree. Bikini Girl looked totally stunned, then pissed. It was the best part of the night for me. LOL. I gained respect for Kara after that.