David Letterman: Dr. Phil McGraw, the latest "American Idol" castoff
Jimmy Kimmel: Megan Mullally, Erin Andrews, National School Scrabble 2010 Winners Evan McCarthy & Bradley Robbins
Craig Ferguson: Jonah Hill, Emily Procter
Carson Daly: Antoine Fuqua, OK Go, Paolo Nutini (R 3/16/10)
Daily Show: Lisa P. Jackson
Colbert Report: Sharon Jones and the Dap-Kings
Regis and Kelly: Christopher Walken, Kristen Cavallari, the Broadway cast of "American Idiot"
Ellen Degeneres: Annette Bening, Science Guy Steve Spangler
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