A 41-year-old man was arrested outside the 'Falling into You' singer's Canadian home for allegedly following the singer.
The man reportedly pressed the intercom at the mansion's front gate on Friday night (13.02.09) and demanded to see Celine or her husband Rene Angelil.
After he refused to leave, security officers called the police. The man ran away, but was arrested a short time later when he returned to Celine's house.
He was sent to hospital for a psychiatric evaluation and is due to appear in court today (16.02.09) to answer charges of harassment and stalking.
Celine is yet to comment on the frightening ordeal.
The 40-year-old singer recently revealed she and her 66-year-old husband are trying for another baby.
Celine - who welcomed son Rene-Charles into the world in 2001 after having a series of fertility treatments - said: "We are going to give it a try after my tour. Hopefully we are pregnant again. I have a small window of hope. But we have been so blessed already. We tried six years for Rene-Charles. We have our miracle baby."