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During the December 23 installment of 'Knowing Brothers', Seo Jang Hoon and Kang Ho Dong faced off against each other to see who is better looking. While doing so, Oh My Girl made a surprise appearance to reveal the results of a poll that was taken at the Korea University. The girls also revealed that the results were based on 41 foreigners, to expand the survey beyond just Koreans. The girls will also appear on next week's episode.

Meanwhile, Oh My Girl will be making their comeback with 'Secret Garden', 5th mini-album, on January 9, 2018.