Sandi Toksvig had to step in for Big Narstie after he called in sick on "Great Celebrity Bake Off for Stand Up to Cancer".
Tuesday night's (19.03.19) charity episode of the Channel 4 show sees the programme's co-host replace the rapper, with Noel Fielding joking that it's a "seamless swap", as he brands his colleague "Little Narstie".
He says at the start of the programme: "There has been a development overnight.
"Unfortunately, Big Narstie can't be with us today as he's a little bit unwell, but he will be replaced by another baker. It's a seamless swap, don't worry."
Sandi then admits she hasn't baked a cake since school, quipping: "I haven't cooked a sponge since domestic science O-level."
The "QI" star goes head-to-head with Johnny Vegas, Olympian Katarina Johnson-Thompson and MP Jess Phillips.
However, it doesn't go as badly as she anticipates, as she shares: "The thing that I really learnt today was to throw yourselves into it, give it a go, raise some money for Stand Up To Cancer and you have a lovely end product as well."
Michelle Keegan won last week's "Celebrity Bake Off".
The "Our Girl" actress was named Star Baker ahead of Russell Tovey, Rylan Clark-Neal and James Acaster after impressing judges Prue Leith and Paul Hollywood with her minty flapjacks in the signature challenge, winning the technical with her French Horn and presenting a ski-themed meringue for her showstopper.
Michelle's meringue featured a tiny half skier buried in the show and was hailed by Paul as "faultless".
The 31-year-old actress - who is married to Mark Wright - described her win as a "proud moment".
She said: "Really big achievement. Probably one of the proudest moments of my life."
The judges were very impressed by her prowess in the kitchen.
Prue said: "She hasn't put a foot wrong. Everything has tasted right, looked fantastic. She's a pro."
By contrast, comic James flopped in every challenge and admitted he hadn't enjoyed taking part, branding it the "worst experience" of his life.
And he quipped after the results were in: "What a crock of nonsense. They don't recognise a true talent when the see one."
Rylan won praise from the judges and though he didn't win, he didn't mind because he'd had an "amazing" time in the famous tent.
He tweeted: "Well done @michkeegan you absolute star. So amazing to work with @russelltovey and @JamesAcaster .
"I'm now officially a little bit obsessed with James and I just want to look after him. Thanks @BritishBakeOff for an amazing time and get donating to @SU2CUK x (sic)"
Last week, Russell Brand was named Star Baker in the first episode of the celebrity series, partly due to his cake honouring his wife Laura Gallacher giving birth to their two daughters.