The battle is on for this week's episode of SBS's "Kiss & Cry", as viewers focus their attention on the top two rivals of the show, Son Dambi and f(x)'s Krystal. Krystal, who achieved 1st place in the third round of the contest, made a perfect transformation into Keira Knightley for this week's "OST" concept by dancing to an OST track from the blockbuster hit, "Pirates of the Carribean". Together with her 'Jack Sparrow', the couple displayed a fantastic performance filled with sword fights and full-body lifts, leaving the audience and judges greatly impressed. Krystal's biggest rival, Son Dambi, dressed up in a beautifully modified qipao gown to match their dance concept, which was based around the Chinese hit film, "In The Mood For Love". Her captivating gaze and hot red lipstick helped Son Dambi wow crowd, as she boldly moved to a�Pussycat Dolls remix. Despite an awkward situation where Son Dambi experienced a slight wardrobe malfunction with her partner's pants, the couple managed to pull off a completely professional routine. So who will take the #1 spot this week? Stay tuned! Source: Sports Chosun via Nate [gallery] Source: Sports Chosun via Nate