The third week of Britain’s Got Talent 2009 has featured some of the most weird – and wonderful auditions from London and Manchester.

And there were a few surprises for auditionees in Manchester – most notably the addition of a fourth judge in the shape of Kelly Brook.

The actress and model was originally brought into the show as a permanent new addition to the judging panel, but was dismissed after just a week.

However producers have said that it was “impossible” to edit her out of the show due to her involvement in the Manchester auditions – so she was billed as a “guest judge”, and is likely to make further brief appearances as the series goes on.

Among the acts who impressed the judges on this week’s show were 10-year-old Hollie Steel, who look at first as if she would fall foul of the judges’ buzzers when she turned up in a tutu and began a ballet routine.

However she went on to sing I Could Have Danced All Night from My Fair Lady – and her vocal talents left the panel stunned.

“You were incredible,” Kelly said, “beautiful and lovely”.

Simon had other views. “I didn’t like what you were wearing because you came over as a typical little girl who wants to be a ballerina,” he told her.

“I wasn’t crazy about the song but then I heard you sing. I think that you have a fantastic voice.”

In London the judges were captivated by Diversity, a dance troupe ranging in age from 12 to 25.

Their act, which included one member of the troupe emerging from a bag midway through the routine, was described as “genius” by Simon.

But not everybody impressed the panel to such an extent. In Manchester strongman Mike Henderson left Kelly and Amanda shrieking after his knife balancing act apparently went wrong. The 62-year-old appeared to slip and land just inches from a dangerous blade after Piers pressed his buzzer.

He ended up grabbing the knife with his teeth, but it still wasn’t enough to see him through to the next round.

Also missing out on a semi-final place was Dan Kahn, who performed as drag queen Tia Anna. Both Piers and Kelly voted him through in spite of his out of tune performance of the classic hit Without You. “That was one of the liveliest things I’ve seen,” Piers told him.

However Simon and Amanda weren’t so keen.

“Drag acts are my favourite,” Amanda admitted, “but you were rubbish.”