Cowell 'holds plans for Lewis world tour'

Music mogul Simon Cowell is reportedly apprehensive about allowing Leona Lewis to embark on a world tour - because he is unsure if the newcomer is ready to perform in front of thousands of fans.

The 'American Idol' judge has overseen the 'Bleeding Love' hitmaker's career since she won his British talent show 'The X-Factor' in 2006.