"APT." is a collaborative single by South Korean singer Rosé and American singer-songwriter Bruno Mars, released on October 18, 2024. The track draws inspiration from a popular Korean drinking game called "Apartment," reflecting a night of revelry that culminates in a passionate encounter in an apartment setting.

The song achieved significant commercial success, debuting at number one on the Billboard Global 200 and the Billboard Global Excl. US charts. It also reached number one on South Korea's Circle Digital Chart, the Billboard Japan Hot 100, the New Zealand Singles Chart, and Australia's ARIA Singles Chart. In the United States, "APT." debuted at number eight and later peaked at number three on the Billboard Hot 100, making Rosé the first K-pop female act in history to have a top-ten and top-five entry on the chart.

Tracklist:

Side A
A1. APT. (Rosé & Bruno Mars)