NEW YORK, NY - JANUARY 15: Ella Henderson arrives for the "Late Show with David Letterman" at Ed Sullivan Theater on January 15, 2015 in New York City. (Photo by Donna Ward/Getty Images)
NEW YORK, NY - JANUARY 15: Ella Henderson arrives for the "Late Show with David Letterman" at Ed Sullivan Theater on January 15, 2015 in New York City. (Photo by Donna Ward/Getty Images)