Leona track leaked online

Music mogul Simon Cowell has alerted police after computers belonging to his record company Syco – part of Sony BMG – were hacked into, and an early version of Leona Lewis' hotly-anticipated collaboration with Justin Timberlake appeared online.

The single, called ‘Don’t Let Me Down’, was being considered as the first release from Lewis' second album - a follow-up to her 2007 smash hit ‘Spirit’.