Who Are These People???

So the new cast of Dancing with the Stars was announced today and while I didn't see it, I did read who was casted and I am like - really - I don't know who some of these people are...

I Do Know These People:
Melissa Joan Hart
Kelly Osbourne
Donny Osmond
Natalie Coughlin
Mya
Kathy Ireland
Macy Gray
Aaron Cart

But who the heck are these people?:
Chuck Liddell
Louie Vito
Michael Irvine
Debi Mazar
Ashley Hamilton
Joanna Krupa
Tom DeLay
Mark Dascasos

Where do these people come from?

Strange....