"Ditto" is a song by the South Korean girl group NewJeans, released on December 19, 2022, by ADOR, a label of Hybe Corporation.

The producer 250 composed "Ditto" with Ylva Dimberg, who wrote the lyrics with The Black Skirts, Oohyo, and NewJeans member Minji.

With a sound rooted in Baltimore club, the track incorporates a balladic electronic and dance production with influences of house, breakbeat, and UK garage.

It also currently holds the record for longest-running Perfect all-kill—a feat referring to a song's consistent number-one position on IChart's real-time, daily, and weekly charts—at 655 hours.

[1] Music critics praised the wintry, minimalist, and nostalgia-inducing production and deemed it a refreshing alternative to the maximalist sound that had saturated the K-pop market.

The accompanying music video was shot in Daegu, South Korea, and depicts the group members as high-school students recording their daily lives using a camcorder.

South Korean girl group NewJeans released their first eponymous extended play (EP) in August 2022 to commercial success and critical acclaim.

[5] The following day, Min stated that the project would feature artists Oohyo and The Black Skirts, who had written part of "Ditto"'s lyrics, and advertising director Shin Woo-seok, who had directed its two-part music video.

[15] Soft, staccato beats and claps using 808 drums drive the track[14][15][16] and create syncopated rhythms that evoke UK garage, breakbeat, and 1980s house.

[17][18][19] Joshua Minsoo Kim of NPR wrote that the synth chords feel like "freshly fallen snow, embodying the down-home comforts of the holiday season",[14] and JT Early of Beats Per Minute felt the soundscape was "chill" and "slightly darker" than the group's previous output.

[9] Bang Ho-jung of Kookje Shinmoon was moved by the song and thought that the "simple sound" allows the listener to focus on the vocals, melody, and lyrics.

[10] Critic Kim Yun-ha deemed the composition "ordinary", but found the song emotionally touching, writing that "Ditto" encapsulates a winter made of "small fragments of memories that were hidden between the bone-chilling sub-zero cold, the huge tree, the noisy street scene and the laughter of friends".

[12] Sara Delgrado of Teen Vogue deemed "Ditto" one of their best releases yet,[15] while Rolling Stone India's Divyansha Dongre said that the track was a "phenomenal" ending to their 2022 "musical chapter".

[28] "Ditto" debuted at number one on South Korea's Circle Digital Chart in the issue dated December 18–25, 2022, earning NewJeans their second number-one single in the country after "Attention".

Shin said he "wanted to talk about the fact that the relationship between an idol and a fan ultimately comes to an end, the meaning of the process, and the existence of each other", but he was unsure of how the video would be received.

He introduced a sixth unnamed character, intended to symbolize NewJeans' fans, to provide a different point of view and to showcase the choreography in a way that fit into the story.

[75] The music video was mainly shot in three locations around Jung District, Daegu: Gyeseong Middle School, Cheongna Hill, and Dongsan Medical Center.

Shin thought it could be a realistic and effective medium to convey Hee-soo close relationship with NewJeans, as she is shown filming her friends dancing with the camcorder.