As she rockets to the top of the charts on both sides of the Atlantic, there are fears that it might all be getting a bit too much for Susan Boyle again.

The Britain's Got Talent star is currently in America promoting her debut album I Dreamed A Dream, and has been met by crowds of fans at all of her appearances.

But after a triumphant performance on NBC's Today at the Rockefeller Centre in New York, she was spotted sitting motionless with her thumb in her mouth and then sobbing while surrounded by eager fans.

The pictures have led observers to worry about a repeat of the breakdown the 48-year-old Scot suffered after her defeat by Diversity in the final of Britain's Got Talent earlier this year.

And it is feared the hectic schedule and massive attention may be taking its toll on the spinster.

She was mobbed by fans holding banners and waving Scottish flags when she arrived in New York on Sunday, and her minders had to separate the crowd to get her to a waiting limousine.

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