A number of videos and posts claim that the 19-year-old's death was faked, a hoax or possibly even a case of mistaken identity.
Despite these sad accusations, the rapper's death has been well documented and official police statements have confirmed the tragic end to his life.
As previously reported on WHO, in a statement released on Twitter, the Broward Sheriff's Office said: "The adult male that was taken to the hospital has been pronounced dead.
"The adult male victim has been confirmed as 20-year-old Jahseh Onfroy aka rapper XXXTentacion."
Watch the video below which shows a figure which appears to be XXXTentacion squashing rumours of his fake death.
Do you believe he's really gone, or could there be more to this theory? Let us know on Facebook.