Former "American Idol" contestant Katharine McPhee and "Chuck" star Zachary Levi teamed up for an unlikely collaboration -- a duet.
The two recorded a new version of "Terrified" -- a song originally on Kat's "Unbroken" album featuring folk singer Jason Reeves.
FYI -- the track was penned by "Idol's" very own Kara DioGuardi.
