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.