World great people celebrity. I am Irish please kiss me. Famous people you didn't know were Irish, Surprising Irish Celebs, You may be surprised to learn that some of your favorite figures can trace their roots to the country. You may not have realized that these celebs can trace their roots back to the Emerald Isle. Mariah Carey Mariah Carey is one of many stars you might be surprised to learn has a little bit o' the Irish in them! During an interview, the music superstar joked about her mixed heritage: "My mother is Irish, my father is black and Venezuelan, and me -- I'm tan, I guess." President Barack Obama President Obama He may be the country's first African-American president, but Barack Obama is actually part Irish, too. Though his father was from Kenya, his Caucasian mother had Irish roots (among other European ancestry) and the president's great-great-great-grandfather reportedly emigrated from Ireland around 1850. Christina Aguiler...