John bakes a lovely Victoria Sponge and fills with jam and cream cheese frosting while Charlotte gives advice about making cream cheese frosting!
I went pretty extreme because I was in an extreme state.
Back in 2005, Joe Cross was sick and obese, but after undergoing a major lifestyle change, he managed to lose six stone on the juice plant diet.
After once weighing 22 stone - he now weighs just 17 and says that he's never felt better. He joins Lorraine today to discuss his new movie Fat Sick and Nearly Dead 2.
After Monday's Lorraine, cake-making extraordinaires John Whaite and Charlotte White will be on our Facebook page to answer any questions you have about baking and cake decorating!
Get your questions in now and the pair will answer as many as they can from 9.30am.
John bakes a cake showing how to achieve a good vibrant colour with professional colour pastes, available online and in craft shops.
Then, Charlotte shows how to cover the cake in white sugarpaste to conceal the colour within - including how to roll out icing, how to get it on the cake, and how to get the perfect finish!
Are you battling with your butter icing? Having trouble with your texturising or perhaps you have some problems with your piping? We want to hear from you if you have a cake decorating question!
Our cake experts John Whaite and Charlotte White will be answering your questions on Monday 20 April.
Get in touch via Twitter (using #LetThemTweetCake), Facebook or by emailing email@example.com, by 9am on Monday 20 April and we may use your comments on the show. You must be 18 and over, for terms and conditions visit itv.com/terms.
On Thursday 23 April John and Charlotte will be on the show to conclude our fantastic Let Them Tweet Cake baking and decorating campaign - and to mark the occasion will make a special cake of your choice!
Simply cast your vote in the below poll by midday on Tuesday April 22 and they'll put their heads together to bring you the best possible version of that type of cake. Which will it be?