She didn't do blackface. Here's her quote:
"But what is racist? You truly do get in trouble if you are a white person who puts on blackface at Halloween or a black person who puts on white face for Halloween," she asked her panel. "That was OK when I was a kid, as long as you were dressing like a character."
She didn't do blackface?
You just quoted her with the word "blackface" in her quote. If one would simply look at the history of blackface you would understand why people were offended. She is a high paid television personality and should have done her homework and stayed away from the racial garbage...
edit: unless you meant she didn't dress up as blackface