On the August 29th episode of MBC's Bouquet, 4minute's Gayoon mistakenly called After School's Lizzy "unnie" (older sister). During the "I'm Best At Arguments" corner, Gayoon asked MC Go Young Wook,

"Do you really like Lizzy-unnie?"

Lizzy was born in 1992 and Gayoon was born in 1990, making Gayoon the unnie.�To this netizens have responded, "Which of you are lying about your age" and "Even if it was out of competitiveness, I don't understand why she would used the title of 'unnie'." A representative of Gayoon's said,

"Upon confirming with her, we conclude that it was a result of Gayoon not really knowing Lizzy, and it just resulted out of trying to get a rise from the opponent...There were no ill intentions, and we hope that others would see this the same way."