On this week's episode of OnStyle's 'Lipstick Prince,' the fifth princess was introduced as SISTAR's Bora!  However, before her identity was unveiled on the show, the princes had to guess. 

Heechul asked the princess, who was hiding behind blinds, "Give us a hint," and she said, "I tried to hold P.O's hand, but he dodged it," raising curiosity. 

Heechul jokingly said to P.O, "Now who did you hurt?" and a taken aback P.O said to the princess, "Maybe you did something wrong to me?" 

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The princess was then revealed to be SISTAR's Bora, and P.O asked, "When did I do that?"  She replied, "We performed on stage together once for an award ceremony. We decided to hold hands on stage, but you wouldn't take my hand," sounding upset.  P.O assured her, "I didn't because I was nervous."

Seeing how uneasy P.O looked, Heechul said, "His naivete is all an act," making everyone laugh.