APT. (song)

"APT." is a song by New Zealand and South Korean singer Rosé and American singer-songwriter Bruno Mars. It was released through The Black Label and Atlantic Records on 18 October 2024, as the lead single from Rosé's debut studio album, Rosie (2024). "APT." marked Rosé's first solo single in three years and her first release since departing from YG Entertainment and Interscope Records in 2023. The song was written and composed by various contributors, including Rosé and Mars, and includes elements from the 1982 tune "Mickey" by Toni Basil. It is an up-tempo pop, pop rock, pop-punk, and new wave track, featuring indie rock and electropop influences. Inspired by a South Korean drinking game, the song's chorus is built around the game's rhythmic chant of apateu (Korean: 아파트; lit. 'apartment'; pronounced [a̠pʰa̠tʰɯ]).

Critics lauded "APT." for its catchy production, broad cross-cultural appeal, and its role in promoting Korean culture worldwide. It was the best-selling global single of 2025 according to the International Federation of the Phonographic Industry (IFPI), marking the first time an artist outside of North America or Europe topped the IFPI Global Single Chart and the first song with non-English lyrics to do so. The song spent 12 weeks atop the Billboard Global 200, becoming Rosé and Mars's second number-one single each and the number-one song on the 2025 year-end chart. In South Korea, it peaked at number one on the Circle Digital Chart for ten weeks. "APT." was the first song by a K-pop female soloist to top Australia's ARIA Singles Chart and the first Western song to top the Billboard Japan Hot 100 in over a decade. The song saw huge global success, topping the charts in over 50 countries including Austria, Belgium, Canada, Germany, Indonesia, New Zealand, Norway, the Philippines, Sweden, Switzerland, and Taiwan. It peaked within the top three in the United Kingdom and the United States, the first song by a K-pop female act to do so on either.

An accompanying music video was directed by Mars and Daniel Ramos and premiered on Rosé's YouTube channel simultaneously with the single's release. The video featured Rosé and Mars as a garage band with matching black leather jackets in a pink-coloured set. The song broke a number of viewership records on YouTube, becoming the fastest music video by an Asian act to reach one billion views on the platform. "APT." was also the second-fastest song and the fastest by a K-pop artist to reach one billion streams in Spotify history, and the top song of 2025 on Apple Music. Rosé promoted the song with performances on The Seasons: Lee Young-ji's Rainbow, BBC Radio 1's Christmas Live Lounge 2024, The Tonight Show Starring Jimmy Fallon, and with Mars at the 2024 MAMA Awards and the 68th Annual Grammy Awards. "APT." received numerous accolades, including Song of the Year at the Asia Artist Awards, MAMA Awards, and MTV Video Music Awards, and International Song of the Year at the Brit Awards, making Rosé the first K-pop artist in history to win at the latter. It earned three Grammy Award nominations for Best Pop Duo/Group Performance, Record of the Year, and Song of the Year, becoming the most-nominated song by a K-pop artist and the first to be nominated in a Big Four category as a lead artist.