Susan Boyle has been forced to miss two shows on the Britain's Got Talent tour after being told to rest by doctors.

Fans at the Britain's Got Talent live shows in Manchester were told the singing phenomenon would not be appearing.

The star, known as SuBo, was whisked to a secret location in London after performing in Sheffield.

A show spokesman said: "Susan has been advised to rest. She sends her sincere apologies to her fans for not appearing at Manchester's MEN Arena."

Susan, who received standing ovations at the first three BGT shows, is said to be worried about letting her fans down.

But bosses are petrified it is all a case of too much too soon for the overwhelmed star, who recently spent four days in The Priory with exhaustion.

Susan is reportedly desperate to be back on stage for two shows in her native Scotland tonight and tomorrow.