Names such as Post Malone, Diplo and Charli XCX paid tribute to Lil Peep following the news.
He was known for habitual drug use and even referred to himself as a "productive junkie".
Almost a month on from his passing, a coroner in the USA state of Arizona has determined that upcoming rapper Lil' Peep died of an accidental overdose of the pain-relief drug fentanyl and anti-anxiety medication Xanax.
Us Weekly reports the 21-year-old succumbed to "the combined toxic effects of fentanyl and alprazolam".
Keegan-Michael Key mocks Roy Moore, endorses Doug Jones for Senate
Nelson's attorney, Gloria Allred, said at a Friday press conference an independent expert verified the signature. Moore's subsequent appearances have mostly occurred at churches or religious gatherings.
The news arrives almost one month after Lil Peep was found dead on a tour bus in Tuscon, Arizona, where he was scheduled to perform. "I did it all with my friends, and it was very organic".
Official video for hugely popular Lil Peep track Awful Things ft.
Peep died in November 15 on the Tuscon, Arizona stop of his tour in support of his debut album, Come Over When You're Sober (Part One).
His recent track Awful Things featuring Lil Tracy, has been viewed more than 10million times on YouTube.