The artist's first album, titled "17" and released in August 2017, debuted at the No. 2 spot on the Billboard 200 chart.
Broward County detectives are getting all the help they need from fans of XXXTentacion who jumped into action to track down the shooters minutes after the 20-year-old rapper was gunned down.
Onfroy was leaving RIVA Motorsports in Deerfield Beach on Monday afternoon when he was approached by two men.
In a recent interview with Miami New Times at his home in Parkland, Florida, the rapper denied the allegations, which were made by a girlfriend who was pregnant at the time.
At least one of them fired, and then both suspects fled the scene in a dark SUV, Concepcion said.
XXXTentacion's most recent album, entitled?, was a No 1 hit in the United States this year and included the hits Sad! and Changes.
On Twitter, his peers expressed shock and sadness.
Kanye West led the tributes Monday, saying he was grateful to the young rapper "for existing". R.I.P. XXXTentacion - your family is in our thoughts right now.
Rapper J Cole hailed the star's "enormous talent and limitless potential".
XXXTentacion has faced several legal issues and was now awaiting trial on charges that he beat his pregnant girlfriend. In March, a judge released him from house arrest so that he could tour.
His music was removed from streaming giant Spotify's curated playlists for several weeks earlier this year because his lyrics allegedly promoted "hateful messages", Pitchfork reported.
Videos circulating on Twitter showed Onfroy was sitting in the front seat of his auto seemingly unconscious when he was found by witnesses.