A politician's "spur of the moment" charity idea left her more than £14,000 down after promising £1 for every retweet she got on Twitter.
This year's Comic Relief has raised a record £75.1 million so far, beating 2011's total of £74.3 million.
Jessie J is set to shave her head live on television in a bid to raise money for Comic Relief.
Comedian and actress Miranda Hart turned wedding planner as she was challenged with arranging a real marriage ceremony in a matter of hours for Comic Relief.
The star of Miranda and Call the Midwife was given the task as part of her week of work for Comic Relief, called 'Miranda's Mad March' - which has seen her organise a dog show and perform a routine for Strictly Come Dancing.
Hart was told of her latest task during a live broadcast on Radio 2 by DJ Chris Evans. The lucky couple were Claire Gilchrist, 26, and Ben Pringett, 28.
Catwalk star Kate Moss put in a model performance on air when she read an extract from the steamy bestseller Fifty Shades of Grey to raise money for Comic Relief.
The British model had to suppress giggles as she read from the E L James novel during the Nick Grimshaw's Radio 1 Breakfast Show.
Singer Lily Cooper and comic David Walliams also joined her in the studio, raising more than £250,000.
Dawn French is following in the footsteps of Ricky Gervais, returning with a one off comeback as the Vicar of Dibley, for Comic Relief.
Featuring Homeland star Damien Lewis as a man of the cloth, Dawn French will revive her role of Geraldine Granger, reuniting with the original cast for the first time in seven years.
The ten minute sketch, written by Richard Curtis, will air tomorrow night as part of the Comic Relief broadcast.
Ms French will also deliver the daily Pause For Thought religious slot as the character during the Chris Evans Radio 2 breakfast show earlier in the day.
Stand up comedian Peter Kay will be spending more time sitting down this week, as he travels from Belfast to London, from the comfort of his sofa.
The funnyman will arrive in London during the Red Nose Day broadcast being screened by BBC1 and BBC2 on Friday evening.
Following the success of previous cover single Is This The Way To Amarillo, Kay has also recorded a new version of the video to the James single Sit Down, with the group's lead singer.
"Having undertaken a rigorous training regime to prepare for the challenge, Peter will not only have to endure the physical strain put on his body, but be mentally psyched up to withstand days of sitting down for the Comic Relief sketch," a spokesman joked.
Eighties stars Tony Hadley and Kim Wilde sang their way into the record books today after performing the highest ever concert together on a jumbo jet.
The Spandau Ballet star and the Kids in America singer put on an acoustic show for 128 passengers on a Boeing 767 aircraft at 43,000 feet (13,000 metres) for Comic Relief.
Comic Relief has apologised to its supporters after Frankie Boyle caused controversy at a charity gig with a string of gags about the Queen and the Duchess of Cambridge.
The comic was reported to have been booed by the audience at the Give It Up for Comic Relief concert at Wembley Arena after launching into a routine which included jokes about the Queen's recent illness, the Duchess of Cambridge's pregnancy and the Jimmy Savile sex scandal.
A spokeswoman for the charity said: "The Give it Up for Comic Relief gig included a range of comedians and performers who all gave their time for free to raise awareness and money for a serious issue.
"We appreciate that not all the personalities who take part in our campaign are to everyone's taste, and hope that our supporters haven't been offended and continue to support Red Nose Day."
The Prime Minister's wife has been baking to raise money for Red Nose Day.
A red-wigged Samantha Camera posed for photographs today as she and her children produced tasty treats to be sold in aid of Comic Relief.
The cakes will be sold to staff at Downing Street and money raised will go towards this year's campaign.
David Cameron will make his latest Comic Relief appearance by starring in a music video with teen heart-throbs One Direction, a spokesman for the charity said.
Mr Cameron has followed in the footsteps of Tony Blair and Gordon Brown in getting involved in the fundraiser, which has raised £800 million since 1985 to help alleviate poverty.
He appears in the official video for One Direction's official Comic Relief single, a cover version medley of Blondie's One Way or Another and the Undertones' Teenage Kicks.
"Yes, he is in it," the spokesman said, but was unable to say what his role included.
The Prime Minister did not appear in clips from the video shown during Saturday's Let's Dance for Comic Relief.