TV presenter Holly Willoughby was left visibly emotional as she filmed her brand new BBC challenge show, Freeze the Fear with Wim Hof. In a recently released trailer for the show - which sees famous faces pushing themselves to the limit in sub-zero temperatures - Holly, 41, can be seen looking glassy-eyed and fighting back tears as she watches on.The video begins as Holly, 41, introduces TV fans to the new series where a group of brave celebrities will take on a series of epic mental and physical challenges set by “The Iceman” himself - Dutch extreme athlete and cold-water therapy advocate, Wim Hof. Get exclusive celebrity stories and fabulous photoshoots straight to your inbox with OK!'s daily newsletter As footage of the star line-up facing their fears and throwing themselves into the challenges plays, Holly’s voice can be heard saying: “Eight celebs.