Sophie Piper was forced to sit out of the task during Thursday night's Love Island after being struck down by a mystery illness.The majority of islanders took part in the challenge, Lads Vegas, which saw the boys strip down to gold hot pants and pick a girl to "marry" in a Las Vegas-esque chapel. But viewers were left confused when 21 year old Sophie was noticeably missing from the slow motion running scene that aired before the task too place.