Amy Winehouse `thrills fans with secret gig`

The 27-year-old singer, who recently spent six days in rehab, was said to be back to her old self and was even cracking jokes on stage during the Sunday night show at the 100 Club.

A source told The Sun, 'Gone was the fragile, volatile and unpredictable Amy. She wasn't knocking back vodka on stage and she definitely hadn't stopped by at the off-licence on her way to the gig.

'Amy was on fantastic form. She looked and sounded great. It was like one of her old performances.

'She had the crowd laughing along with her gags, poking fun at herself and dad Mitch. She also threatened to flash her boobs and made a few jokes about her voluptuous look.'

The Back To Black singer's boyfriend, film director Reg Traviss, joined her dad in the crowd, and Mitch said that he couldn't be happier with her choice of beau.

'Amy's very loved up with Reg. I absolutely approve of him,' he said.

'I hope the next couple of years hold a lot of happiness for my family.

'What Amy likes about Reg is that he looks like my father in the Fifties at his age. He looks more like my father than I do. It's quite amazing actually. Although it's also a bit weird, isn't it?'