There's Something About Susan, review Susan Boyle stood at the back door of her modest terrace house shielding the sun from her eyes. "I think the nerves are good really - you don't know how you feel until the night," she said. The expression that rippled across her features contained a multitude of emotions: frustration, awkwardness, above all, deep-set terror. There were lots of scenes like that in There's Something About Susan, which followed the singer as she prepared to tour for the first time. Boyle's voice is one of the more lucrative in show business, propelling her toward albums sales of 20 million. But in There's Something About Susan the fascination was with her face, the way her lips quivered, her eyes flashed, as she wrestled with her existential dread of performing before a living, breathing audience. For all her accomplishments, it can be argued Boyle's career has never fully transcended its freak-show beginnings. A picture of tea-lady frumpiness she seemed destined to be hooted off stage when auditioning for Britain's Got Talent in 2009. In a clip subsequently watched nine million times online, she instead delivered an incredible version of I Dreamed A Dream, sending Simon Cowell's jaw clacking to the floor. There have since been wobbles, most prominently an anxiety attack in her first flush of celebrity that led to a spell in the Priory. This suggested a reluctant civilian catapulted into the public eye. There's Something About Susan added texture to her story. Far from a dazzled naif reeling in the spotlight it was clear Boyle does not fear success. Beneath the nervousness, her ambition gleamed fiercely. Aside from the bombshell that she buys her stage frocks at John Lewis, the documentary's big reveal - widely reported earlier in the week - was that Boyle has Asperger syndrome, a mild form of autism. "I have always felt misunderstood," she says, perched stoically on a bench. I knew I was different. But I didn't understand it. Told from childhood that she had an impaired IQ as a result of a difficult birth, the Asperger diagnosis lifted a weight from her. "I am okay," she said, as the news sank in. I am perfectly capable.  Though there was no Hollywood closure - knowing she has Asperger syndrome didn't prevent Boyle continuing to break down at rehearsals - There's Something About Susan did lurch towards a sunny conclusion. She survived her jaunt around Scotland with sanity unscathed and, increasingly at ease with the adulation, got through a big American concert. Throughout the narrative was framed in unabashedly uplifting terms. We were invited to view Boyle's story as an old fashioned triumph of the human spirit over daunting odds. And if the tension was never quite as excruciating as the filmmakers may have silently wished - were we ever in any real doubt that Boyle would pull the tour off ? - the happy ending nonetheless felt entirely earned.