Genealogy meets the reality-show format, with researchers aiding celebrities in their quests to discover their origins. Rosie O’Donnell’s ancestors were deeply affected by the Irish potato famine of 1845. Kim Catrell deals with her family’s abandonment issues. Lionel Ritchie’s great-grandfather has a mysterious past. Ashley Judd’s passion for activism may be genetic. 2011. Acorn Media (acornonline.com). —Nancy Ford
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