O.O

"O.O" is a song recorded by South Korean girl group Nmixx for their debut single album Ad Mare. It was released as the lead single by JYP Entertainment on February 22, 2022. Background and release On July 9, 2021, JYP Entertainment announced it would be debuting a new girl group in February 2022, the first since Itzy in 2019. On February 2, 2022, it was announced that the group would debut on February 22 with the release of Ad Mare. Six days later, the track listing was released with "O.O" announced as the lead single. On February 17, the first music video teaser was released. Two days later, the highlight medley video teaser was released. On February 21, the second music video teaser was released. The song alongside the music video was released on February 22. Composition "O.O" was written by Dr.JO (153/Joombas), composed by EJAE along with Brian U, Enan, MarkAlong, Charlotte Wilson, Chanti, Awry, Ayushy, Jan Baars, and Rajan Muse from The Hub, and arranged by the former three. was described as a song with "mixture of baile funk, teen pop, and pop rock" genres with "intense captivating trap intro". The A section of "O.O" was composed in the key of E minor, with a tempo of 133 beats per minute, and the B section was composed in A major with a tempo of 100 beats per minute. Critical reception Upon its release, "O.O" received mostly negative reviews from music critics. Tanu I. Raj from NME described the song as "a rollercoaster ride of genres [from] electropop to pop rock to hip hop" and compared the song to Girls' Generation's "I Got a Boy" and Aespa's "Next Level" however stating that "'O.O' comes off as a weak facsimile in the face of the complexity of the former [duo]" and that "'O.O' tries, but fails, to capture any attention for very long." Korea JoongAng Daily noted that "Because of its disjointed nature, many criticize that the song tries to push for an edgy and provocative image but is difficult to follow as it lacks a basic musical structure." Pop music and media studies professor Lee Gyu-tag elaborated on this by saying although it had similar musical styles as "Next Level", it "was much more melodious and had smoother transitions" than "O.O", as well as pointing out that following the song was difficult because of the lack of a clear standout melody.