"Hollow" is a song by South Korean boy band Stray Kids from their fourth Japanese-language extended play of the same name. It was released as the EP's lead single by Epic Records Japan on June 11, 2025, alongside its music video.
Stray Kids announced their fourth Japanese-language extended play (EP) Hollow on April 14, 2025, to be released the next two months, on June 18. The EP's track list were unveiled on April 25, including the lead single of the same name "Hollow". The song is available on digital music and streaming platforms on June 11, a week before the EP release.
The song's title "Hollow" contains double entendre in both English and Korean hollo (), which the latter means "lonely". A pop track with strong synthesizer, electric guitar, and emotional piano, the song lyrically expresses the feeling of sudden emptiness in a day. It also applied to the band wanting to fulfilled their fans called Stay's loneliness.
An accompanying music video for "Hollow" premiered on June 11, 2025, in conjunction with the single. Directed by Novvkim and filming in Seoul, South Korea for two days, the music video depicts Stray Kids as Pinocchio attached to strings and being controlled by external forces becoming a real human, as well as emotional choreography.
Stray Kids debuted "Hollow" and its live performance on May 10, 2025 at the Dominate World Tour, taking place at Shizuoka Stadium, Fukuroi. Later, the group perform the song on ' on June 13, alongside "Walkin on Water", ' on June 18, and The First Take on July 2.
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