Susan Boyle now needs 24-hour care, says her brother John in a shocking revelation in 'PEOPLE' magazine that will stun her loyal fans.

It is the first time that John has spoken out about his sister, who was catapulted to fame last year on ‘Britain's Got Talent,' but who has often struggled in public with the burden of her unexpected success.

Her other brother Gerry has often voiced concern about Susan, but the fact that he has now been joined by John is a matter of deep concern.

"The traveling and the whole [fame] thing is exhausting. She still has her anxieties and her loneliness," her brother Gerry tells PEOPLE.

Boyle acted erratically at Heathrow Airport recently and it seems nighttime is especially tough for her since her house was broken into in Blackburn in Scotland.

She makes many late night calls to friends and family, which has fueled the speculation that she is need of help.

A close friend has revealed that she often comes to stay with her. "She knows she can come up to me anytime," says Lorraine Campbell. "If she's upset, she'll stay the night. Security would bring her up to my house. I take her home in the morning. Susan stayed with me a week ago. Nighttime is a lonely time for her."