London, March 12 (IANS) 'Girls Aloud' star Cheryl Cole has sparked health fears after scrapping a string of TV and radio gigs.

Doctors have told her she is far too sick to carry on with her hectic schedule. Now she is holed up at home and struggling to leave her bed, dailystar.co.uk reports.

According to a source, the singer has been hit by bronchitis.

'Cheryl has been a trouper up until now but the pressure has finally got to her. She is very sick and feeling very, very low. The bronchitis has knocked her clean off her feet,' said the source.

Her estranged husband Ashley is concerned about her health and is desperate to fly back to Britain to be by her side.