Police in Dublin are investigating reports that a stalker broke into Enya's mansion, it has emerged.
Enya's first hit was Orinoco Flow in 1988
He tied up a maid, then spent two hours looking for Enya in her castle in the plush Dublin suburb of Killiney. The singer hid in a panic room.
The stalker escaped with a number of items when Enya activated an alarm.
A week previously, another man who broke into Enya's six-bedroom home was arrested. The multi-millionaire singer has now increased security at her home.
Enya has suffered at the hands of stalkers before these latest ordeals in the past few weeks.
In 1996, a 31-year-old Italian, who had moved to Dublin to be near Enya, stabbed himself outside a County Donegal pub owned by the singer's parents.
According to the Sunday Times Rich List, Enya is the joint 78th richest person in Ireland with an estimated fortune of 100m euros (£70m).
The singer, who was the world's biggest selling artist in 2001, has a reputation for closely guarding her privacy.