Hilary Duff Was ‘Taken Aback’ by Ashley Tisdale’s Mom Group Essay: ‘I Felt Used’: Tisdale wrote about being iced out of a celebrity mom group that was presumed to include Meghan Trainor, Mandy Moore, and Duff, who claims the mean… #HilaryDuff #AshleyTisdale #CelebrityNews #MomGroupDrama #MeanGirls