Rochelle is among 16 celebrities who will enter the Bake Off tent and attempt to impress Mary Berry and Paul Hollywood for charity.
During her pregnancy with baby Alaia-Mai, Rochelle baked her husband Marvin plenty of yummy cakes, so we think she'll go far!
Also joining the lineup is Loose Woman and singer Jamelia, Olympian and former Strictly Come Dancing star Victoria Pendleton and acid-tongued Dancing on Ice judge Jason Gardiner.
Blue Peter's Helen Skelton will be hoping to show off her skills, along with Michael Ball, Samantha Bond, Emma Freud, Jane Horrocks, Doon Mackichan, Alistair McGowan, Greg Rutherford, Johnny Vaughan, Michael Vaughan, Bonnie Wright and Kirsty Young.
Great British Bake Off host Sue Perkins will be on hand to calm the bakers' nerves, and comedians Jo Brand, Omid Djalili, Ed Byrne will each present an episode. Jo and Ed took part in The Great Comic Relief Bake Off 2013.
The celebrities will be put through their paces on signature, technical and showstopper bakes.
Helen Skelton says: "I decided to take part in The Great Sport Relief Bake Off because I'm absolutely rubbish at baking. All my friends and family laugh at anything I do in the kitchen, so I thought this might be a chance to redeem myself.
"I wished I'd practiced more beforehand. When they said to me, 'You've got to make a pizza' I thought they meant just put the toppings on a pizza, I didn't realise they meant make the dough and everything!"
The Great Spots Relief Bake Off, Monday 13 January, 8.30pm, and Tuesday 14 to Thursday 16 January, 8pm, BBC2.
Who do you think will impress Mary and Paul? Tell us below!