Ross and Smack The Pony star Doon Mackichan ended up with the least number of votes from viewers and then faced a knock-out selection on Friday night from their star singing mates for a place in the BBC One academy.

TV presenter Ulrika Jonsson, comedian Jo Brand and seven other stars bravely sang for a place in TV's Fame Academy in aid of Comic Relief.

Ms Jonsson said she wanted to save Mackichan "because she has great teeth".

The celebrities were put through their singing and dancing paces in a charity version of BBC One's talent show.

Ms Jonsson was the first to take the stage, admitting to nerves before giving a rendition of Neil Diamond's You Don't Bring Me Flowers.

Comic Ruby Wax, This Morning critic Paul Ross, actor John Thomson, Saturday show presenter Fearne Cotton and Casualty actors Will Mellor and Kwame Kwei-Armah also took part.

Survival

They were joined by Doon Mackichan, announced as the mystery celebrity who replaced ex-footballer David Ginola.

The remaining seven stars must sing for their survival every day for the next seven days before the winner is declared on Comic Relief Day, 14 March.

Ulrika was the first star to perform

Ulrika was followed by Casualty actor Will Mellor, who chose Robbie Williams' Let Me Entertain You for his performance.

Frank Sinatra's That's Life was the choice of Paul Ross who shouted "You're beautiful people, let me touch you all" to the audience.

"I know I can sing up a storm. I'm probably the best singer here," he joked to co-host Patrick Kielty.

Cooking

As with the original BBC TV show, it will be hosted by Kielty and Cat Deeley and led by head teacher Richard Park.

As tutors, England rugby Lawrence Dallaglio and boxer Audley Harrison will be helping with fitness levels while hypnotist Paul McKenna will help the stars overcome stage fright.

Waxing lyrical: Ruby chose an 1980s hit

Musical impresario Andrew Lloyd Webber will also be popping in to give advice.

Celebrity hairdresser Nicky Clarke will give the stars a make-over and Ready Steady Cook presenter Ainsley Harriot will be cooking.

Money from each vote will go to Comic Relief, which raises money for charities both home and abroad.

The original Fame Academy made stars out of winner David Sneddon, runner-up Sinead Quinn and other students including Ainslie Henderson.