Title: "Dots all..."

John Mayer will appear tonight on CBS' "Late Show with David Letterman" and afterward will do a "Live on Letterman" concert Webcast that will be available at CBS.com. ... VH1 is taking a novel approach to celebrity coverage tonight at 8 with "Top 20 Celebs Gone Good," a look at the charities and causes that some big-name celebrities support...

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