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The theme song to Psych, I Know, You Know, is performed by series creator Steve Franks and his band, the Friendly Indians. WIKI. You can download the MP3 from the link I am providing. These lyrics were all I could find off of someone's blog.
Best Answer: Dennis Tufano and Mindy Sterling sang the theme song used in the first season. The theme song for seasons 2-7 was sung by Johnny Mathis and Deniece Williams. You can find both of them here: http://www.sitcomsonline.com/familytiess...