Katie Couric on the 'Today Show' on NBC. New York City, USA - 26.05.06

The show will feature a three hour tribute to Couric and performances by TONY BENNETT, MARTINA McBRIDE and the cast of the Broadway show JERSEY BOYS.

The star claims she hasn't come to grips with leaving the show yet saying, "I haven't really thought about it and worried about it. I'll do what I've always done for 15 years and be myself. I'll react the way I react."

The 49-year-old will take the summer (06) off and then report for work as the new anchor of the CBS evening news in September (06).