British television and music mogul Simon Cowell was “completely freaked out” after discovering a sophisticated tracking device attached to the undercarriage of his Bentley Continental last week.

Simon’s security team found the bug after the American Idol judge noticed that a mysterious biker kept following him to private meetings.

“His security team found this tracking device under the car. It was quite sophisticated and could have been used by the security services.”

“Simon is completely freaked out by this. He can’t believe someone has gone to so much trouble and expense to monitor his every movement. It’s extremely sinister,” an insider tells Britain’s Daily Mail.

“Simon has his suspicions as to who is responsible. He is so angry he is considering calling in the police to investigate further.”