Take an up-close and personal look inside some of today's most beloved and iconic celebrities as this second series of Who Do You Think You Are? USA explores the family histories of Gwyneth Paltrow, Tim McGraw, Rosie O'Donnell, Steve Buscemi, Kim Cattrall, Lionel Ritchie, Vanessa Williams and Ashley Judd.The search into her late mother's roots leads Rosie anew branch of her family and an expedition to Ireland. Kim travels to her native England to unlock the 70-year-old mystery behind her grandfather's abandonment of his young family. Lionel Ritchie unlocks the mystery of a man his grandmother never spoke of... Gwyneth's journey is one of myths & true spirituality and Ashley Judd discovers her links to the Mayflower and a Civil War hero. The search and compelling story and link to inherited depression leads Steve Buscemi to his great-great grandfather.Each episode reveals surprising, inspiring and sometimes tragic stories that are often linked to events in American and international history. Our celebrities are taken on journeys of surprising and deeply emotional encounters with compelling conclusions.