Barbara Bush (the younger) in 2012

Barbara Bush -- the granddaughter of First Lady Barbara Bush -- smiles at a promotional event for a book titled, "A White House Christmas: First Families Remember." This was in New York City on December 12, 2012. (Just in time for Christmas!) Barbara Bush and her twin, Jenna Bush, were born in 1981, so she turned 31 the year this photo was taken.