On the October 9 airing of Mnet's 'Unpretty Rapstar,' Yubin and Hyorin faced off each other in a diss battle, an event that drew much attention simply from the fact that they two are both idols. 

Both of them showcased witty punchlines and rhymes, spitting their words with fire! Yubin went first, mentioning somewhere along the line SISTAR and two of their members Soyu and Bora. Hyorin, who started off her diss with "Wonder girls, come on," seemed confident, spitting her verses with ease and a nonchalant smirk on her face. 

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The rest of the contestants were thoroughly impressed with both of the idols and how well they did during the diss round. Yezi complimented Yubin's diss, saying, "It's the first time I saw her rap in offense mode. It was really refreshing." 

Truedy showed some respect for Hyorin, declaring that she will no longer, "act cheeky towards her," and praised, "She was really cool." 

Though Yubin and Hyorin did well, the producers who were invited on this episode, The Quiett and Dok2, selected Hyorin as the ultimate winner. 

Yubin, devastated at her loss, couldn't hold swallow her tears as she relayed during the interview, "People will say no matter what that I'm a rapper who lost to a vocalist. Honestly, my pride is wounded."