Ariana Grande fears her alleged stalker will "murder" her or her loved ones.
A man named Aharon Brown was arrested on September 9 after trespassing at her property, allegedly brandishing a large hunting knife, which he is said to have threatened to use on the "7 Rings" singer's security team when they confronted him.
Ariana has applied for a restraining order against the man, who she claimed had been terrorising her for seven months.
She wrote in a document obtained by TMZ: "I am fearful for my safety and the safety of my family. I fear that absent a restraining order, Mr. Brown will continue to come to my home and attempt to physically harm or murder me or members of my family."
A law enforcement officer also filed a declaration stating he felt the restraining order was essential because he feared the alleged stalker would be released from jail.
The 28-year-old star was at home when Brown turned up to the property with the knife.
He is said to have screamed at her security: "I'll f**king kill you and her."
Police were called and the man fled on foot, ignoring multiple orders to stop before eventually being taken into custody.
Brown is still in custody and has been charged with two felony counts of making criminal threats.
The "Voice" coach - who is married to Dalton Gomez - was granted the protective order.
Meanwhile, last month, the "Positions" singer offered a "gentle reminder" to fans to get their coronavirus vaccination amid the rise of the Delta variant in the US.
Alongside a picture of herself wearing a mask, she wrote on Instagram: "vaxxed n masked.
"this is your gentle reminder to please get your vaccines if you are eligible. this thing is not yet over ! sharing some info because i care and if i can, i'd like to help anybody who is hesitant or curious with making their decision.
"this delta variant is very new and since data is changing all the time, i'll source some links for you to stay up to speed yourself but so far ... we do know that it spreads much more easily compared to previous variants. most of the spread is among unvaccinated people and in areas with low vaccination rates !
"and yes although you can still get it while vaccinated, the vaccine helps to protect against severe illness, hospitalization, and death ! all great things to be protected against in my book. oh and if you have already gotten sick with COVID-19, you should STILL get vaccinated ! (sic)"