Rosie O'Donnell isn't the only one who has suffered through an embarrassing interaction with a celebrity!
Back in 2015, Jason Derulo called the show to talk about So You Think You Can Dance.. and Kellie accidentally had a foot-in-mouth moment. The guys were shocked when she said it but waited a full day to call her out on it. In the meantime, she had to wait and wonder what it was that she said so bad.
Here's the moment in question.. How bad do you think it is?

From 6/9/15.