The 75-year-old star has just started to rebuild his life after his historic molestation case was thrown out two months ago when the court felt there was "insufficient evidence" to charge him, but he's now set to face fresh anguish after the Crown Prosecution Service confirmed the case is being revisited.
A spokesman for the CPS told the MailOnline: "We have received a Victims' Right to Review request.
"That is happening at the moment. The request was received at the beginning of August."
The 'We Don't Talk Anymore' hitmaker was reportedly told of the challenge just before the death of his beloved sister Donna Goulden - who along with his other siblings Joan and Jacqui supported him throughout the investigation - earlier this month following a long battle with an illness.
Cliff's life was turned upside in 2014 when police stormed his house in Sunningdale, Berkshire, after four men claimed they were victims of sex abuse between 1958 and 1983.
The legendary singer has always denied the allegations but the lengthy investigation went on for 22 months.
However, it took prosecutors just one month to consider the allegations before rejecting them in June this year.
Upon hearing the outcome, Cliff said he was "obviously thrilled that the vile accusations and the resulting investigation have finally been brought to a close."
But he admitted the fact he was named in the media, despite not being arrested or charged, meant he had been "hung out like live bait" and he doesn't think his career will ever the the same again as a result of the allegations.