Myeh. Call me when they finally book Stephen Hawking . . .ABC says the 13th season of the hit show will feature a mix of actors, athletes and TV personalities. Set to tango and quickstep with professional dance partners will be basketball star Ron Artest; World Cup soccer player Hope Solo; reality stars Robert Kardashian, Kristin Cavallari and Chaz Bono; TV personalities Nancy Grace, Carson Kressley and Ricki Lake; singer-actress Chynna Phillips; actors David Arquette and J.R. Martinez; and Italian actress Elisabetta Canalis, who may be better known in the United States for being George Clooney's ex-girlfriend.