He's surely received threats before throughout his long-spanning career as a notoriously sharp-tongued reality TV judge and producer.
But possibly not from the mouth of a 14-year-old teenager.
Last night Simon Cowell was left shocked after he was given a stern warning from pint-sized rapper Brain Bradley during the East Coast auditions of the U.S. X Factor.

The teen became irritated after Simon questioned him on why he deserved to be on the talent show.
'Yo yo Simon, I see you man... What is your problem man?... Are you serious? Yo, I swear on your life... if we were on the streets,' he directed at the 51-year-old Brit.
But as the teenager busted into a rap it was clear to see that his threatening tone was actually part of his performance that sent the audience into a frenzy.

As the crowd went wild for the youngster, the judges stared around in disbelief as he rapped about his mother.
'Brian honey, I am scared of you, and I am not going stare at your mother,' joked judge Nicole Scherzinger.
L.A . Reid, who has produced the likes of Kanye West, Usher and Rihanna, told Brian he had been waiting for someone like him to come into his professional life for years.













Brian Bradley - Audition 1 - THE X FACTOR 2011
Clarissa Cheatham - Audition 1 - THE X FACTOR 2011
Brennan Hunt - The X Factor U.S. - Audition
Tiger Budbill - The X Factor USA Auditions
Andy Silikovitz - Audtion 1 - THE X FACTOR 2011
Skyelor Anderson - The X Factor USA Auditions
Cari Fletcher - Audition 1 - THE X FACTOR 2011
The X Factor USA - Ausem - Jar of Hearts - Audition
source: dailymail