Scottish singing sensation Susan Boyle, who shot to world-wide stardom with her appearance on the British television show Britain’s Got Talent is set to make a return after being treated for a breakdown at a private London clinic.

The 48-year-old church volunteer from Blackburn, West Lothian, is set to begin rehearsals for the Britain’s Got Talent tour and could be back belting out tunes by as early as Friday, when the show begins.

Despite earlier doubts, the Britain’s Got Talent runner-up is more hopeful than ever about performing in the first show in Birmingham because she has round-the-clock support from private GP Dr Sarah Lotzof to ensure she doesn’t have a relapse.

Boyle spent five days at The Priory, a clinic which specializes in mental health, before being allowed to leave yesterday (June 8).

It’s also been reported that 46-year-old Demi Moore and actor husband Ashton Kutcher, 31, are prepared to pay Boyle £30,000 ($US38,500) to perform at their Hollywood party in September.

A week ago it was reported the singer some have affectionatly dubbed the “Hairy Angel” will perform for US President Barack Obamas’ Independence Day celebrations at the White House on July 4.

Boyle shot to fame on the British-style version of American Idol when judges and the audience were stunned by her performance of I Dreamed a Dream from the musical Les Miserables.

Despite finishing second in the television talent show, it has been predicted that Boyle could earn as much as £8 million ($US13 million) from deals in the US including a recording deal and shares of album sales, a Hollywood movie of her rags to riches life, a book deal and millions more from image rights, endorsements and television appearances.