There has been a last minute replacement too. Comedienne and Smack The Pony star Doon Mackichan is stepping into footie heart-throb David Ginola's boots.
He pulled out because he says he has flu. Apparently he is very disappointed about missing out.
Each night the three worst-performing students will be put on probation and will have to sing for their survival.
Which means one will be expelled each day until the winner is decided on Comic Relief Day, 14 March.
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