"Sad!" (stylized in all-caps) is a song by American rapper XXXTentacion from his second studio album, "?" (2018). It was released as the lead single from the album on March 2, 2018. The track was produced by John Cunningham, and written by XXXTentacion. The song is XXXTentacion's highest charting in the United States, peaking at number one on the "Billboard" Hot 100 following his death on June 18, 2018. The song has also amassed more than 1.5 billion streams on Spotify, being one of the most streamed songs on the platform. The song remains X's biggest hit single to date.