Robin Roberts has watched "Late Show with David Letterman" countless times before.
But the "Good Morning America" co-anchor never appeared on the program. Not until Tuesday, when she visited "Late Show" to promote her new book, "Everybody's Got Something.""
She posted a photo while waiting backstage.
During her appearance, Roberts spoke with Letterman about the medical obstacles she's faced and overcome. Roberts, a breast cancer survivor, was later diagnosed with myelodysplastic syndrome or MDS, a rare blood disorder.
She underwent a bone marrow transplant in 2012, receiving donor cells from her sister, Sally Ann. Through it all, she's maintained a positive outlook, saying she wouldn’t change a thing.
"I can look at you right now and say I am healthier and happier than I've ever been," she said. "That's all that matters."
Letterman remarked on the book's title, saying how appropriate it is. "Nobody gets a free ride," he said.Read More »from Robin Roberts Tells Letterman She's 'Healthier and Happier' Than Ever Before