"Mic Drop" (stylized as "MIC Drop") is a song recorded in two languages (Korean and Japanese) by South Korean boy band BTS. The Korean version was originally included as a B-side track on the band's fifth extended play, Love Yourself: Her (2017), and later remixed by American producer and DJ Steve Aoki. The remix was released as the second single from the EP on November 24, 2017 by Big Hit Entertainment and features a guest appearance by American rapper Desiigner. It was serviced to US contemporary hit radio on December 5, 2017, as a single in that country. The Japanese-language version of "Mic Drop" was released on December 6, 2017 by Def Jam Recordings and Virgin Music as a triple A-side single album that included "DNA" and a new, original song "Crystal Snow", both also in Japanese. Both the Korean and Japanese versions of the song were written by Supreme Boi, "Hitman" Bang, J-Hope, RM, and Pdogg, with the latter of the five solely handling production. The remix version was also written by the same songwriters, with additional songwriting by Aoki, Desiigner, Tayla Parx, Flowsik, and Shae Jacobs. It was produced by Aoki, with Pdogg providing additional production. An EDM and trap song with hip hop leanings, the lyrics celebrate BTS' numerous achievements.
The song received generally favourable reviews from music critics, who praised its beat, sound, and musical styles, and picked it as a standout track, on Love Yourself: Her. Commercially, the remix version of "Mic Drop" debuted at number 28 on the US Billboard Hot 100, becoming the band's first track to reach the top 40 on the chart. The song appeared at number 37 on the Canadian Hot 100 and number 46 on the UK Singles Chart, in addition to reaching moderate peaks in several other territories. The Japanese version debuted at number one on both the Oricon Singles Chart and the Billboard Japan Hot 100. It was the 13th best-selling single of 2017 in Japan. It was certified platinum by the Recording Industry Association of America (RIAA) and double platinum by the Recording Industry Association of Japan (RIAJ).
Two music videos were filmed for "Mic Drop", one for the Korean remix version and one for the Japanese version. Woogie Kim directed the music video for the Korean version which premiered on Big Hit's YouTube channel at the same time as the song's release. The video for the Japanese version was uploaded to Universal Music Japan's YouTube channel on December 5, 2017. Both videos depict the band performing powerful choreography in various settings. Following the release of Love Yourself: Her, BTS appeared on several South Korean music programs including M! Countdown, Music Bank, and Inkigayo. They promoted the remix version of the song with performances on The Ellen DeGeneres Show, Jimmy Kimmel Live!, and Saturday Night Live, amongst others. It was also included on the setlist for the band's Love Yourself World Tour (2018–19).
