Simon Cowell is beside himself with fury after Leona Lewis’ new single — which features Justin Timberlake –was leaked to the Internet this week.

Police have been called into investigate the breach of computers belonging to Cowell’s record company Syco – part of Sony BMG. The computers were allegedly hacked into and an early version of “Don’t Let Me Down” –the British singer’s collaboration with Timberlake — appeared online.

“Syco are working alongside the International Federation of the Phonographic Industry, the British Phonographic Industry, the police and investigators in this and they are making fast progress,” a company exec said in a statement Tuesday. “We will certainly look to bring charges against those who are responsible. We cannot give any more details at this stage for operational seasons.”

Leona’s second album – a follow-up to her 2007 international smash Spirit – is expected to include collaborations with Ne-Yo, will.i.am, and Jay-Z and is due for release this November.