Ever wonder how Cher manages to look so great at age 66? Look no further than her genes, as evidenced by a photo the singer/actress tweeted of her beautiful mother, Georgia Holt, on Wednesday.Cher and her Mom/Twitter The shot was taken en route to meet President Obama--Cher took Mom along as her "date"--and it appears even he was impressed by Holt's slender and youthful appearance. "Told him mom's 86," Cher tweeted of the meeting. "He said 'Georgia, tell me what u eat' & smiled!"