Music
The X Factor supremo is said to think that Lewis does not have the confidence to play to large audiences every night at this stage in her career.
"Although Simon believes in Leona as a world-class solo singer, he still feels she does not have enough confidence to play to large crowds on her own," a source told The Sun.
"There is certainly a real art to getting the audience in the palm of your hand as entertainers such as Mariah, Robbie Williams and Elton John can do. Leona is Simon’s little baby and he is very aware of how shy she is."
It was earlier reported that Lewis will team up with Justin Timberlake to record a duet of Dolly Parton song 'I Will Always Love You'.
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