FALL PREVIEW: New 'Dancing' cast

So, whom from this list do we want to see least? Kelly Osbourne? Ashley Hamilton? Tom DeLay? Michael Irvin?

Which assumes, of course, that you know who all these people are.

(MTV reality kid, George Hamilton son, ex-Republican congressional whip/lobbyist pal, ex-Dallas Cowboy/crime suspect/broadcaster.)

They're four of the strangest celebs on the next cycle of ABC's ballroom competition Dancing With the Stars, set to start Sept. 21. Of course, this is a series that always delivers something surprising. Who knew Lil' Kim, the ex-con rapper, would be such an elegant dancer in last spring's edition? Did we really think beat-up aw-shucks bull rider Ty Murray could improve his ballroom dancing skills from zero to, uh, 60 per cent?

One thing we know for sure: Tom Bergeron is the reality-competition genre's wittiest host, always fun to watch reacting to live-broadcast achievements and disasters (remember his poise when Marie Osmond went down) -- not to mention quick to quip every time judge Bruno Tonioli shrieks another ultra-fab metaphor.

The new cast of 16 DWTS twinkle-toes announced Monday on Good Morning America also includes singers, snowboarders, models and martial artists.

Here's the full list:

AARON CARTER -- Singer/songwriter, actor and younger brother of Backstreet Boys singer Nick Carter.

NATALIE COUGHLIN -- Olympic swimming gold medalist of 2008 and 2004 Games.

MARK DACASCOS -- Host of Food Network's Iron Chef America, actor, trained martial artist.

MACY GRAY -- Singer/actress whose debut album On How Life Is and single I Try both went to No. 1.

ASHLEY HAMILTON -- Son of former DWTS contestant George Hamilton, appearing in film, comedy and television (Sunset Beach).

MELISSA JOAN HART -- Star of TV's Clarissa Explains It All and Sabrina the Teenage Witch, now mother of two toddler sons.

KATHY IRELAND -- Supermodel and fashion guru.

MICHAEL IRVIN -- Former Dallas Cowboys wide receiver, radio-TV sportscaster, host of Spike reality show 4th and Long.

JOANNA KRUPA -- Polish-born model/actress and PETA spokesperson.

DEBI MAZAR -- Goodfellas actress, now in HBO's Entourage.

MYA -- Grammy-winning singer, seen in the film Chicago.

KELLY OSBOURNE -- Ozzy Osbourne's daughter, known for TV celebreality groundbreaker The Osbournes and ABC drama Life As We Know It.

DONNY OSMOND [photo at top] -- Lead singer of The Osmonds, duet partner of ex-DWTS contestant Marie Osmond, actor, now performing in Las Vegas.

LOUIE VITO -- Professional snowboarder favored to make the 2010 Olympic team.