In 2011, she gave the university commencement speech at Boston University and was awarded another doctoral degree, Doctor of Humane Letters. She has also hosted a Sesame Street special, "When Families Grieve". The special, which aired on PBS on April 14, 2010, dealt with the issues that children go through when a parent dies. On February 6, 2011, Couric guest-starred on the post-Super Bowl episode of "Glee", playing herself interviewing Sue Sylvester after the cheerleading team lost the championship. Sylvester sarcastically referred to Couric as "Diane Sawyer" during the segment.