Susan Boyle’s fledgling singing career hit another bump yesterday when she pulled out of two Britain’s Got Talent Live tour dates.

The 48-year-old Scot was due on stage for a matinee and evening show at the Manchester MEN Arena but concert-goers arrived to find the venue adorned with notices announcing her withdrawal.

A spokesperson for the church volunteer, who was admitted to a psychiatric hospital after coming second on the ITV talent show, said that after performances in Birmingham and Sheffield she had been advised to withdraw from the Manchester concerts.

"Following three sensational performances, Susan Boyle has been advised to rest.

"She sends her sincere apologies to her fans for not appearing in Manchester."

Britain’s Got More Talent presenter Stephen Mulhern was met with boos when he introduced a video clip of the church volunteer's rapid rise from TV show contestant to global star in place of her performance.

While the Manchester audience were offered refunds if they chose not to watch the show, other tour ticket holders are hoping they could still see Boyle live.

The singer’s spokesperson said Boyle had not ruled out returning to the 21-date tour of the UK and that she hoped to perform tonight in her home country at Glasgow SECC.

She was greeted warmly by the audience at the tour’s opening night in Birmingham on Friday and received a standing ovation in Sheffield on Saturday despite stumbling on her words.

Two weeks ago it looked unlikely Boyle would make any appearances on the tour after she was taken by ambulance, and with police escort, to private London hospital The Priory suffering from exhaustion.

Her illness is widely believed to be the result of her sudden fame and the media and Britian's Got Talent producers have faced wide-spread criticism.

She left the clinic after five days but remains under the care of doctors.

Editor's choice

• The 100 Best Films of the Decade
• 70 facts you didn't know about Marvel
• The 50 Biggest Movies Of 2010