Noel's invited some of his showbiz chums to come take part in some special editions of Are You Smarter Than A Ten Year Old?

Several famous faces put their reputation on the line to win up to £250,000 for their chosen charities in Celebrity Are You Smarter Than A Ten Year Old?

Attending classes for the celebrity specials were ex-Eastender Martine McCutcheon, Olympic Gold medallist Sally Gunnell, I'm a Celebrity Star and Liza Minnelli's ex husband David Gest, XFM DJ Alex Zane plus The Cruise star Jane Macdonald, Dead Ringers Jon Culshaw and GMTV presenter Richard Arnold.

Watch the funniest moments from celebrity Are You Smarter here!