As we are taking a look at undies this week, we bring you a special long distance 7 Day Challenge duet featuring Katie and Kelli Smith. We feel that the Bridget Jones films have given big pants a bad reputation and we wanted to fix that. So each day our presenters will be reviewing big knickers. For Day 5 we also have Kelli Smith reviewing the Lé Buns Zari organic cotton high waist front seam detail brief as Katie has done today. Come back tomorrow for Kelli's penultimate day of her challenge. Will Kelli and Katie have the same views and pick the same knickers after reviewing the same ones this week? Find out on Sunday.

"They are kind of like a Brazilian as they are not a full back brief and not quite a thong either." Kelli Smith