We take a look at some well-known celebrities and the dumpy doppelgangers they could have turned into if they had swapped Bikram Yoga for biscuits and cakes...
Jelly Halliwell: Former Spice Girl and broadcaster Vanessa Feltz
Titanic-sized Leo: Movie star DiCaprio and comedian James Corden
Kym Marshmallow: Corrie star Marsh and X Factor singer Mary Byrne
Who's had the Special Kay? Family Fortunes' Vernon and comic Peter
George Balloony: Hunky actor Clooney and chunky TV star Eamonn Holmes
Roly-poly Coley: Singer Cheryl Cole and her larger lookalike, TV cook Nigella Lawson
XL Factor: Matt Cardle and his super-sized doppelganger Johnny Vegas
Big hair, bigger body: Friends star Jennifer Aniston and actress Liza Tarbuck
Catherine the greater: Ms Zeta-Jones and comedienne Dawn French
Simon Jowl: X Factor guru Cowell and Harry Potter star Robbie Coltrane
Old (and added) Spice: Singer Emma Bunton and TV's Judy Finnigan
George after a gorge: Former Wham! star Michael and DJ Chris Moyles