Gossip Girl star Michelle Trachtenberg was spotted cosying up with [lastfm]John Mayer [/lastfm]in Los Angeles recently.

“Michelle was bouncy and flirty.

She seemed smitten with him,” the New York Post quoted one witness as saying.

But the Mayer “seemed too cool for school and non-expressive.”

Sources say the pair have known each other for years.

[lastfm]John Mayer[/lastfm] will be in conert in Dallas Saturday, Sep. 4th at Superpages.com Center

Tickets on sale at LiveNation.com

John Mayer – Live On Letterman