It was released for digital download and streaming as a single on January 13, 2020, through KOZ Entertainment and Kakao M. Lyrically devoid of any characteristic message, the dancehall and hip hop song features an addictive chorus and sees Zico switching between rapping and singing.

An accompanying music video was uploaded to Kakao M's YouTube channel simultaneously with the single release, and features Zico hosting a house party for himself.

"[3] He elaborated on the process behind the songwriting in another interview:"I wanted to make a song people could listen to when they're not thinking about anything.

Billboard's Tamar Herman described the song as "a witty tune that acts as if a lyrical stream of consciousness.

"[5] On January 7, 2020, KOZ Entertainment posted a concept teaser on its SNS account that announced the single's title of "Any Song", and its release date.

[6][18] Following the viral trend, numerous South Korean celebrities participated in the dance challenge, including Girls' Generation's Tiffany Young, Sandara Park, Lee Hyori, Crush, Park Shin-hye, Jang Sung-kyu, and Winner's Mino.

[6][24] On March 23, 2020, Zico performed "Any Song" live for the first time on the South Korean talk show You Hee-yeol's Sketchbook.

[6][7][22] Upon its release, the song rose to the top position of every online streaming site's real-time charts including Melon, Soribada, Genie, Naver, Bugs, and Flo.

[41][44][45] On January 18, 2020, "Any Song" debuted at number one on the Gaon Digital Chart and held its ranking for five consecutive weeks, tying with IU's "Good Day" (2010) and Psy's "Gangnam Style" (2012).

[54] It was the best-performing song of the first half of 2020 in South Korea, based on digital sales, streaming, and background music (instrumental track) downloads.

"Any Song" was eventually certified platinum by the Korea Music Content Association (KMCA) denoting streams exceeding 100,000,000 units in the country.

[55] "Any Song" debuted atop the US Billboard K-pop Hot 100 on January 18, 2020, and spent six consecutive weeks at the top position.

[62][63] The four-minute long visual opens with Zico's friends arriving at his house for a party.

[5][61] The music video ends with Zico leaving his friends and running outside of his house in quest for freedom and happiness.