As a special event to mark this year's Children in Need appeal, the BBC challenges Anneka Rice to make the impossible possible. Anneka discovers what her daunting task is when the Challenge Envelope is opened. She will then have only 12 hours to complete the event.

A year ago, millions of viewers saw Anneka Rice and a team of volunteers rise to the challenge of transforming the lives of hundreds of children living in a huge, decaying orphanage in Siret, northern Romania. In five days, hot and cold running water was installed, lights were rewired, walls painted and bedding replaced. Recently, Anneka returned to Siret to see for herself what successes and setbacks the children have faced during the past year.

A nostalgic review of the last three years of the series with Anneka Rice recalling some of the highlights - including the group of disabled people who learned to ski in two days - and some of the disasters - such as when the entire camera crew fell out of the back of the buggy. She also looks back to one of her most memorable tasks: in 1990 she was challenged to restore an orphanage in Romania. Within a week she had to transform it into a proper home for 600 children. Tonight she finds out how the children's lives have been changed since the team visited.

Celebrating five of years of her entertainment series, Anneka Rice presents a live edition in which she goes back to check out the results of some of her toughest tasks. Armed with her giant Challenger truck, her famous blue buggy and tons of public goodwill, Anneka has been set a variety of problems and has completed more than 40 challenges: from building children's playgrounds in Birmingham and Belfast to equipping a hospital in Malawi. For many, Challenge Anneka was just the beginning. Anneka also launched the Croatia appeal live from the BT Tower appealing for materials to rebuild a school in Pakrac and the goods to be taken on convoy to Croatia. Simon Bates delivered the challenge to Anneka on behalf of the British Red Cross.

Nearly two years after the tsunami claimed more than 200,000 lives, World Vision called on Anneka and set her the challenge. The show, that airs on ITV1 on Boxing Day, marks the second year anniversary and the huge progress has been made in rebuilding lives, livelihoods and communities torn apart by the giant wave.

Anneka’s back with another ambitious challenge - to produce and record an album of songs from the musicals, but she needs to first beg, bribe and bamboozle some of the UK’s highest-profile recording artists and performers to sing. If that wasn’t a daunting enough task, she also needs to throw a Gala concert to launch the album and all this in just five days! All her Herculean efforts will go towards helping forty UK children’s hospices, by raising money and awareness via the CD and Gala event. Children’s hospices are the unsung heroes, who provide vital care for terminally ill children and their families and siblings. They have been largely overlooked by the government and need to raise approximately 85% of all their costs to stay open each year- we’re talking millions! Last year, a staggering 20,000 children across the Click here to buy this CDcountry desperately needed hospice care, only 4,600 received it - a shocking state of affairs! The final and in many ways, the most important element of her challenge, is for Anneka to put together a choir made up of the children from the hospice’s around the country , who are ready, willing and able enough to sing on the CD and perform the title song at the Gala event with a celebrity soloist. For fully able children, used to performing in public in a choir, this would be a nerve rackingAssociation of Children's Hospices undertaking. Anneka will be with them every step of the way, every rehearsal, every forgotten line, every bout of stage fright!