This week’s introduction of four new dance styles challenged both the stars and the professionals who had to educate themselves on styles: the hustle, the West Coast swing, the salsa, and the jitterbug.

With the coming week bringing triple the choreography for the dancers to learn, I think the weak dancers will be weeded out, leaving some of the more obvious contenders to fight for the mirror ball.

Reality show and sex-tape star Kim Kardashian, caustic comic Jeffrey Ross and Olympic gold medalist Misty May-Treanor are among the latest celebrities to try their feet at “Dancing With the Stars.”

ABC yesterday ended months of speculation and online chatter over who might get the call by revealing the 13 contestants. Also among those who will compete are Lance Bass, Toni Braxton, Brooke Burke, Rocco DiSpirito and Susan Lucci.

Kardashian, who has a reality show on E!, cut her foot Sunday on a glass table. She said yesterday on multiple TV appearances that she had the gash glued shut, rather than stitched, to cut healing time.

“The timing was just perfect now,” Kardashian told Kathie Lee Gifford on NBC’s “Today.”

Lucci, famous for playing Erica Kane on “All My Children” and for being nominated 19 times for an Emmy before finally winning, said, “I just feel blessed that they asked me to do this. When else in your life would you really take all of these amazing dance classes?”

Lucci said she’d been asked to be on the show before but turned it down. “I just wasn’t sure if I could fly back and forth across the country,” she said via phone on “Good Morning America.”

Lucci said she spoke to fellow “AMC” star Cameron Mathison after he did both shows last season. “I thought, I really want to do this,” she said. “I’m so excited to be part of this.”

The new season, which gets underway Sept. 22, will have its youngest contestant ever in 18-year-old Cody Linley from “Hannah Montana” and its oldest in TV and film veteran Cloris Leachman, who is 82.

Other “Dancing” stars this time around are Olympic gold medal sprinter Maurice Green, sitcom star Ted McGinley and former football-great-turned-NFL commentator Warren Sapp.

Last season, the show’s Monday segments were the highest-rated, averaging 21.15 million viewers to finish third behind two nights of “American Idol.” That’s up from the 20.4 million viewers posted on the Tuesday editions of the 2006-07 season, that season’s highest-rated shows.

Producers are also mixing up the format a little this season. For the first time, all 13 teams must prepare two dance routines for the first week of competition. The first routine will be performed on the premiere. But at the start of the second night, Sept. 23, one of the couples will be sent packing.

A second team will be dismissed on Sept. 24. Adding to the potential ratings draw for that first official results show will be performances by the Jonas brothers and Jesse McCartney.