This content is copyright of CelebMix.com. The Great Celebrity Bake Off for Stand Up To Cancer returns to Channel 4 this spring, and the 24 famous faces who'll be entering the tent this year have been announced. The celebrity bakers will be taking part in three challenges - the Signature, Technical, and Showstopper - with the aim of impressing the judges. Each episode, one lucky celeb will be crowned Star Baker.