s wild and unpredictable season is nearing its grand finale, as Wednesday determined which contestant would be taking the last spot in the final three.The Queen Cobras, Space Bunny and the Frog Prince all took the stage for the last showdown of Round 3, and each sang their hearts out for the chance at making it all the way to the end of the line.However, only one could claim the spot — meaning fans were in for a double elimination! Which also meant finally learning who some of the costumed crooners really are!After all three of the elaborately crafted characters sang their heart out, it came time for the three to go back-to-back singing alternating verses of Katy Perry's hit «Roar» — and all three slayed their performances, making the audience vote particularly difficult.However, two (costume) heads had to roll, so the first singer to get the proverbial axe was the Space Bunny!Before unmasking, the panel of celebrity detectives -- including Robin Thicke, Jenny McCarthy, Ken Jeong and Nicole Scherzinger — made their final guesses. While Jeong's guess of Owen Wilson was way off, McCarthy was closer when she suggested Sean Kingston.