"That Girl" is a song by South Korean musician Jung Yong-hwa of CNBLUE featuring rapper Loco. It was released on July 19, 2017, through FNC Entertainment and distributed by LOEN Entertainment. A dance-pop song, it serves as the lead single to the Jung's second mini-album Do Disturb (2017). "That Girl" and its music video were concurrently released. Jung promoted the song on various music chart shows, and it peaked at number 77 on South Korea's national Gaon Digital Chart. The track was complimented for its music, but widely criticized for its lyrics. Background and composition "That Girl" was written by Jung and Loco, composed by the former alongside TJ Routon and Jarah Gibson of 80HDMuzik, and arranged by Routon. It is a "funky" dance-pop track with an undercurrent of reggae elements, and it "emphasizes the melody through simple sound sources". The song harmonizes Jung's "overflowing, groovy" vocals with Loco's "light" rap.

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