Touch and go as Boyle joins tour!

Susan Boyle leaves the National Indoor Arena after appearing on stage

Susan Boyle went on stage as part of the Britain's Got Talent live tour's first night in Birmingham - after a last minute decision.

She appeared during the second half of the show at the National Indoor Arena and blew a kiss to screaming fans.

The singer performed I Dreamed A Dream and Memory from the musicals Les Miserables and Cats respectively.

Doubts had persisted over the 48-year-old's fitness to perform after she became ill with exhaustion.

The singer was introduced to the stage by ITV2's Britain's Got More Talent presenter Stephen Mulhern, who described Ms Boyle as being "famous all over the world."

He added: "She's so famous even her pet cat Pebbles is famous."

A tour spokeswoman only confirmed she would sing shortly before the show started.

There had been concerns about her health following her admission to the Priory clinic with exhaustion after she came second in the ITV1 contest.

Boyle's spokeswoman had earlier said it was the star's decision whether she would perform and that she was under no pressure to agree.

Her brother Gerry told the BBC she had been "showing signs of anxiety".

The singer, from West Lothian, shot to fame after surprising the show's judges with her rendition of I Dreamed A Dream in her first audition.

Since then the clip has been watched millions of times on the internet.

She has appeared on various US TV programmes, including Oprah Winfrey's talk show.

However, the pressure on the former church volunteer seemed to have taken its toll after she was admitted to the private clinic, where she stayed for five days.

The arena tour, which will travel across the UK until the end of June, showcases winning act Diversity plus the other nine finalists, including Boyle.

BBC NEWS REPORT.