Featuring more live instrumentation than 17, ? features an array of genres, including acoustic, emo, alternative rock, trap, and cloud rap. XXXTentacion's vocals on parts the album are less restrained and lo-fi-ish compared to 17, with his vocals on introspective songs over piano and acoustic guitar chords being more projected. On other parts of the album, XXXTentacion's style resembles his underground sound, with him screaming. ? received generally positive reviews from critics, and became XXXTentacion's first US number-one album, debuting at number one on the Billboard 200 with 131,000 album-equivalent units earned in its first week. The album has since been certified triple platinum by the Recording Industry Association of America (RIAA). It was supported by three singles: "Sad!", "Changes", and "Moonlight". Following XXXTentacion's death on June 18, 2018, "Sad!" topped the Billboard Hot 100, where XXXTentacion became the first act to earn a posthumous Hot 100 number-one single as a lead artist since The Notorious B. I. G. with "Mo Money Mo Problems" in 1997.