I te marama o Mei 2011, ka kitea e te kaiwhakanao Shinsadong Tiger me AB Entertainment etahi akonga mai i JYP Entertainment ki te hanga i tetahi roopu kotiro hou. Ko te akonga a Yuji te mea tuatahi ki te whakauru mai i te wa kaore i taea e tetahi roopu kotiro JYP te tiimata. I whakapā atu a Yuji ki nga akonga a Hani, Haeryeong, me Junghwa ki te whakamatautau mo AB, ana ko te tokotoru i whakaaetia ki roto i te umanga. I tapirihia e te roopu tetahi mema tuarima i te wa i kitea ai e Shinsadong Tiger LE, he kaiwaiata raro me te kaituhi waiata i mahi i raro i te ingoa Elly. Ko Dami, he akonga AB, te mema tuaono me te whakamutunga i tapirihia ki te roopu. I te timatanga ko "WT", he acronym mo "Ko wai tena", ka hurihia e te roopu to raatau ingoa ki EXID i etahi marama i mua i to raatau timatanga. I te Tihema 2011, i whakaatuhia a LE i roto i te kotahi o JYP Girl "Whenever You Play That", i puta i te tuatahi o te roopu kotiro
Ko Elly