In this photo released by CBS, "Entertainment Tonight" anchor Mary Hart is greeted by host David Letterman after she presents the "Top Ten Things Mary Hart Has Learned in 29 Years Hosting ... more 
In this photo released by CBS, "Entertainment Tonight" anchor Mary Hart is greeted by host David Letterman after she presents the "Top Ten Things Mary Hart Has Learned in 29 Years Hosting 'Entertainment Tonight'" on the set of the “Late Show with David Letterman,” Tuesday, May 10, 2011, in New York. Hart is retiring from "ET" after a 29-year run and her last show airs Friday, May 20. less 
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Associated Press | Photo By CBS, Heather Wines
Tue, May 10, 2011 7:03 PM EDT