Those post-baby pounds just keep falling off yummy mummy Charlotte Church.

The Welsh singer showed off a very trim figure as she attended a lunch for a children's charity in her native Wales yesterday.

Church, 24, looked fit and healthy, proving she has worked hard to regain her figure a year after giving birth to son Dexter.

Yummy mummy: Charlotte shows off her post-baby slim figure in a patterned skirt, T-shirt and heels as she arrives at a charity lunch yesterday

Her straight patterned skirt showed off her long slim legs, accentuated by her peep-toed heels, and her brown T-shirt clung to her curves.

Two weeks ago, she exhibited even more when she was snapped looking lovely in a bikini while on holiday in Dubai with Dexter, two-and-a-half-year-old daughter Ruby and her rugby player partner Gavin Henson.

Yesterday she was all smiles as she attended attended a lunch thrown in her honour by the Children's Hospital for Wales in Cardiff.

Doing it for the kids: Charlotte Church beams as she attends a lunch thrown in her honour by the Noah's Ark Appeal in Cardiff yesterday

Church, 24, is the patron of the Noah's Ark Appeal which has managed to raise £10million towards the hospital since it was launched ten years ago.

Baby weight: Charlotte pictured here in February following the birth of her second child

The mother of two young children has been a 'staunch supporter' of the appeal since she attended the launch in 2000, and has been involved with raising money and awareness ever since.

Speaking at yesterday's lunch at Cardiff's Hilton Hotel, held on the eve of St David's Day which celebrates Wales's patron saint, Charlotte said the charity was very important to her.

She said: 'The charity was important to me because ten years ago I was a child, and now I am a mother, so it is something I can really relate to.

'It is so important for the children in the hospital to be as comfortable as possible and this charity has made a huge difference.

She added: 'It is great to think that the children have the best equipment and are being treated by some of the best doctors in Wales.'

As well as marking ten years since the launch of the charity's public appeal, the lunch was also held to celebrate the fifth anniversary of phase one of the Children’s Hospital for Wales being opened.

In February 2005, the hospital opened and included two 25-bed medical wards and one 16-bed paediatric cancer ward.

The Noah’s Ark Appeal is now hoping to raise a further £7million to complete phase two of the children’s hospital.

The money will go towards a new Critical Care Unit including five paediatric theatres and a £1.5million open MRI scanner – the first in the UK.

Appeal chair Lyn Jones said: 'Charlotte has been alongside us since the beginning of the appeal - you could say that we've grown up together.'

She will appear alongside actress Sheila Hancock and EastEnders actor John Partridge on the judging panel to decide who'll play Dorothy in a new stage production of The Wizard Of Oz.

Coming soon: Charlotte will appear as a judge on the upcoming BBC talent show