Here's the 2006 edition of the popular Harmony Sweepstakes a Cappella series, now in it's 22nd year. The Sweepstakes features the winning groups from eight regional contests: Pacific Northwest (Tongue Tied a Cappella), Chicago (elmoTHUMM), Boston (Traces), Denver (Curious Gage), Los Angeles (Hi Fidelity), Washington DC (Regency), New York (Round Midnight) and San Francisco (Clockwork). Listen to this year's barbershop Champs, Hi Fidelity, perform the theme from the Addams Family in character (Cousin It, Fester, Gomez and the Thing), only to top themselves with a dazzlingly freeform adaptation of "Blackbird" that morphs from key to key in hilarious fashion. Also notable is Clockwork's arrangement of Radiohead's "Creep."