singer Brandon Boyd
has been ruthlessly stalking a former "Real World
" star -- even threatening to kill her -- so says the former "Real World" star ... but Brandon says B.S.Svetlana Shusterman
from "Real World 17: Key West" got a temporary restraining order against Boyd, claiming Brandon's been stalking her for years ... and recently began threatening her life.
Svetlana filed a police report claiming Brandon had followed her car onto a freeway and yelled through the window that he was going to kill her.
Svetlana says she recently moved to a friends house to evade him, but he tracked her down. She writes, "Every day, I am terrified."
Boyd has been ordered to stay 100 yards away from her pending a court hearing next month.
Brandon says it's all news to him. A rep for the singer tells TMZ, "Brandon has been advised about this but doesn’t know anything about it. He doesn’t know this person nor does he recall ever having met her."