The awards, voted on by fans, will be aired on FOX live from Las Vegas on Monday, December 17.
Chenoweth was recently reported as having a scheduled appearance on the September 7 episode of Live! with Kelly and as the inaugural co-host on Anderson Cooper's new show, Anderson Live on September 10.
The actress won a Tony for her performance as Sally Brown in You're a Good Man, Charlie Brown and has appeared on Broadway in Wicked, Promises, Promises, and The Apple Tree. She won an Emmy for her work on the ABC series Pushing Daisies and recently starred in the network's GCB. She will appear on the season premiere of the CBS drama The Good Wife, but has withdrawn from her planned recurring role in the series due to her continuing recovery from an injury suffered on that show's set.