Simon Cowell had to leave 'Britain's Got Talent' auditions after becoming ill.
The 64-year-old music mogul is due to return to screens with his role as a judge on the ITV1 variety competition later this year but when filming audition rounds at the London Palladium alongside Alesha Dixon, Bruno Tonioli, and Amanda Holden he suddenly developed a headache is said to have felt "frustrated" after leaving the set.
An insider told The Daily Star Sunday newspaper: "Simon I was due to film as normal but he started to feel unwell. After some deliberation, he told everyone he was unable to take part in filming. To say he was frustrated is an understatement. Simon loves making 'Britain's Got Talent', so he was annoyed to miss it."
According to the insider, hopefuls lining up for their chance to see the judges were left "upset" because the Syco founder is the one they want to "impress" the most on the panel.
The source added: "The hopefuls were left waiting for quite a while. Then they realised they wouldn't be auditioning for Simon. Many of them were upset because he's the one they want to impress."
The incident means that the former 'X Factor' judge will not be seen on certain portions of the new series - which is due to air from March until June - and his sudden absence has left producers at a loss as well because he is a "ratings winner" they can usually bank on.
The insider added: "Simon is a ratings winner, so it's not ideal that he will be missing from a chunk of the footage."
Another source claimed that Simon suffered a "severe migraine" and explained that usually wears glasses with coloured lenses in an attempt to combat the issue.
The insider told The Sun: "Simon was struck down with a severe migraine.
"He occasionally gets them and that's why he wears glasses with coloured lenses."