Katie and Rachael from north London want to slim down before a weekend getaway and have ten days; Katie tries out the master cleanse diet, rumored to be favored by Beyoncé and made up of water, maple syrup, lemon and cayenne pepper.

Daria and Emma have seven days to drop some pounds for a party; bridesmaids Emma and Elisa test drive a six-week diet plan; Dom and Adam prepare to slim over four months.

Stefanie and Jade have 10 days to slim for a clothing label launch; Matt and Robb battle the bulge for a university reunion; Vicki and Kerry get fighting fit for a mud race.

In a bid to lose weight in 10 days, Amber and Roisin try the Dukan lean protein diet; the abs and the South Beach diets are tested.

Emma tries the baby food diet; Kaye adheres to a strict vegetable-protein ratio for 10 days; Kate gets a glass of champagne a day; Eve draws the short straw with the bland diet.

Stefanie and Jade from Harrow have ten days to slim down before the launch of their clothing label.