Ashley Massaro was scheduled to appear at Starrcast II.
The Massachusetts native died last week.
The presenter has died at the age of 61.
Her injuries were to her head, neck and torso.
Mellon died in a rehab clinic in Mexico.
Bill Rogin, the actor's lifelong agent, confirmed his passing on Twitter.
Details regarding DuShon Monique Brown's cause of death have not been disclosed.
"Fentanyl is not a choice. It's a contamination crisis."
Tom Petty, a Rock and Roll Hall of Fame inductee and the lead singer of The Heartbreakers, has died just weeks before his 67th birthday.
The University of Delaware professor blamed Warmbier's parents for his death in a since-deleted Facebook post.
Warmbier died on Monday, less than a week after he was returned to the U.S. from North Korea in a coma and with severe brain injury.
Gray's death was ruled a homicide.