Christina Aguilera is part of entertainment.
Christina María Aguilera ( born December 18 , 1980 ) is an American singer , songwriter , actress and television personality . After recording `` Reflection '' , the theme for Disney 's 1998 film Mulan , Aguilera signed with RCA Records . Aside from her work in the entertainment industry , Aguilera is involved in charitable activities through human rights , world issues , and her work as a UN ambassador for the World Food Programme .