During John Mayer's performance last night at the Guster/John Mayer concert in Louisville, KY, he asked one of the band's guitarists to come to the mic and sing something. The guy came up and sang a few verses of TMBGITW. Kinda cool. Then, he sang part of some Justin Timberlake song.

It was a great concert. Guster is a great band. And I was surprised at John Mayer's guitar skills. Not too shabby.