Has flying 11,000 miles every week to be with her family jeopardised Sharon's X Factor success?
The strain comes as she tends to her delicate marriage with heavy metal legend Ozzy Osbourne, 64, following their near-divorce-gate.
Sharon, 61, is also supporting son Jack Osbourne, 27, on the US version of Strictly, Dancing With The Stars, a month after his wife Lisa suffered a devastating late-term miscarriage.
It means she’s having to jet back and forth between London and LA to be there for everyone.
Sharon‘s tough, but she’s doing a lot for her family at the moment,’ a source close to The X Factor reveals to Now.
She’s a really family-orientated woman, so this is hard for her.’
While her fellow judges are always on hand for their acts in the UK – Nicole Scherzinger even took her girl, Hannah Barrett, out shopping – Sharon has been relying on phone calls and Skype to communicate with her only remaining act, Sam Bailey.
However, X Factor bosses maintain that Sharon‘s strenuous family commitments haven’t compromised the time she spends being a mentor.
SEE PICTURES Judges Nicole Scherzinger and Gary Barlow join Caroline Flack to launch the new series of The X Factor 2013