THE BUZZ Thursday, September 6:
-John Mayer coming to KFC Yum! Center
-Katy Perry's "Roar" unseats "Blurred Lines," debuts roar contest on GMA
-Mila Kunis and Ashton Kutcher engaged?
-Alec Baldwin gets late night gig
-Betty White makes Guinness Book of World Records for "Longest TV Career"
- Much more!