@frog799 언니~~이~~안녕하시죠?? ㅋㅋㅋㅋ 신인의 자세로~~ㅋㅋㅋ 오늘 뮤직뱅크~~하시는가바요~~ 홧팅!!! 입니다~~~!!"Bad girl~~~" 오늘 열분도 나도 본방사수 입니당~~~☆*:.｡. o(≧▽≦)o .｡.:*☆Don't worry there's nothing wrong going on between Park Bom and Lee Hyori. It's just a cool way of Bom calling Lee Hyori 'Bad Girl' as she supports her on her comeback.
— Bom Park (@haroobomkum) May 24, 2013
On May 24, Hyori uploaded a photo of herself taken in Music Bank's backstage and wrote, 'I will work hard during rehearsals with a new attitude (talking about her single 'Bad Girl').
After posting it, 2NE1's Park Bom responded, 'Hello eonnie! Seems like you'll perform with your new attitude on Music Bank today. Bad Girl fighting! Me and everyone will watch the broadcast!' in which Hyori replied, 'It's been a while Park Bom'.
Source: Hyori and Bom's twitter