"Why So Lonely" is a song recorded by South Korean girl group Wonder Girls. It was released as a CD and digital single by JYP Entertainment on July 5, 2016, distributed by KT Music. The song is a reggae-pop dance track written by members Hyelim, Sunmi, and Yubin, with songwriter Hong Ji-sang. The accompanying music video has a 1970s concept, and was also released on July 5. The single has two B-sides, "아름다운 그대에게 (To the Beautiful You)" and "Sweet & Easy"; the former was released on limited edition vinyl on June 18, 2016. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.