"Good Morning America" co-anchor Robin Roberts is pictured on the set in New York on Thursday, Jan. 24, 2013. (AP Photo/ABC, Ida Mae Astute)
Co-anchors Robin Roberts (left) and George Stephanopoulos appear on ABC's "Good Morning America" on Wednesday, Feb. 20, 2013, in New York. Miss Roberts returned to the popular morning program after undergoing a bone marrow transplant five months ago. (AP Photo/ABC, Heidi Gutman)
Co-anchors Robin Roberts (left) and George Stephanopoulos appear on ABC's "Good Morning America" on Wednesday, Feb. 20, 2013, in New York. Miss Roberts returned to the popular morning program after undergoing a bone marrow transplant five months ago. (AP Photo/ABC, Heidi Gutman)
Co-anchors Robin Roberts (left) and George Stephanopoulos appear on ABC's "Good Morning America" on Wednesday, Feb. 20, 2013, in New York. Miss Roberts returned to the popular morning program after undergoing a bone marrow transplant five months ago. (AP Photo/ABC, Heidi Gutman)
"Good Morning America" co-anchor Robin Roberts is pictured on the set in New York on Thursday, Jan. 24, 2013. (AP Photo/ABC, Ida Mae Astute)
"Good Morning America" co-anchor Robin Roberts is pictured on the set in New York on Thursday, Jan. 24, 2013. (AP Photo/ABC, Ida Mae Astute)
**FILE** "Good Morning America" co-host Robin Roberts (center) poses with her sister Sally-Ann Roberts (left) and Dr. Gail Roboz on the show on Thursday, Aug. 30, 2012 in New York. (Associated Press/ABC)
**FILE** "Good Morning America" co-host Robin Roberts (center) poses with her sister Sally-Ann Roberts (left) and Dr. Gail Roboz on the show on Thursday, Aug. 30, 2012 in New York. (Associated Press/ABC)
**FILE** Robin Roberts, co-host of ABC's "Good Morning America," is seen here Aug. 20, 2012, during a broadcast of the show in New York. (Associated Press/ABC)
