▁F NC ▁Entertainment ▁released ▁a ▁ly ric ▁spo iler ▁poster . ▁A ▁concept ▁tra iler ▁entitled ▁" Let ▁U ▁In " ▁for ▁the ▁single ▁was ▁un ve iled ▁on ▁July ▁ 1 1 . ▁On ▁July ▁ 1 7 , ▁a ▁music ▁video ▁tra iler ▁for ▁" That ▁Girl " ▁was ▁released . ▁The ▁tra iler ▁and ▁music ▁video ▁for ▁" That ▁Girl " ▁was ▁fil med ▁together ▁in ▁a ▁span ▁of ▁two ▁days . ▁Re leased ▁on ▁July ▁ 1 9 , ▁it ▁features ▁a ▁came o ▁by ▁com ed ian ▁Park ▁So o - h ong . ▁Two ▁days ▁later , ▁a ▁dance ▁practice ▁version ▁was ▁released . ▁ ▁From ▁July ▁ 2 0 , ▁Jung ▁began ▁promoted ▁" That ▁Girl " ▁by ▁performing ▁the ▁song ▁on ▁week ly ▁music ▁chart ▁shows , ▁including ▁M net ' s ▁M ▁Count down , ▁Korean ▁Broadcast ing ▁System ' s ▁( K BS ) ▁Music ▁Bank , ▁Mun h wa ▁Broadcast ing ▁Corporation ' s ▁( M BC ) ▁Show ! ▁Music ▁Core , ▁Se oul ▁Broadcast ing ▁System ' s ▁( SB S ) ▁In k ig ay o , ▁and ▁M BC ▁Music ' s ▁Show ▁Champion . ▁ ▁Com mer cial ▁performance ▁On ▁the ▁chart ed ▁dated ▁July ▁ 1 6 ▁– ▁ 2 2 , ▁ 2 0 1 7 , ▁" That ▁Girl " ▁deb uted ▁at ▁number ▁ 7 7 ▁on ▁South ▁Korea ' s ▁national ▁Ga on ▁Digital ▁Chart , ▁s elling ▁ 2 6 ,