To promote the single, the group performed on several South Korean music show programs, such as M Countdown and Inkigayo.

It was composed and written by Duble Sidekick, Bull$EyE, Ondine, De view and Kim Do Da Ri.

[1] Momoland as a seven-member group, released the song "I'm So Hot" from their fifth extended play Show Me in April 2019.

The song was officially released on December 30, 2020, by MLD Entertainment and distributed by Kakao M as the group's second single album.

[6] Seoul Beats described the song as "obvious shift for the group, away from blatant carnival fun towards a more retro, glam and sophisticated look and feel.

[16] The music video for "Thumbs Up" was uploaded to 1theK's official YouTube channel on December 30, 2019, in conjunction with the release of the single.

[17] The video features the group playing two sets of characters: express delivery workers and showgirls.