Tonight on Dancing with the Stars: Semifinals of Season 12

The Dancing with the Stars Season 12 Semifinals officially begin tonight, with the remaining 4 set to perform three dances.  Each couple will have to dance 1 ballroom dance and 1 latin dance that they haven’t yet danced, as well as participate in a winner take all bonus cha cha round.  The winner of the bonus round will have 15 points added to their score, making the margin wider and more difficult for fan votes to close.
I smell something so fishy here, it absolutely reeks. 15 points?  So basically, if your favorite doesn't get the 15 bonus points,  they are telling us we need to power vote to try to overcome that kind of spread. Doing this would seem reminiscent of the voting shenanigans that were pulled on Dancing with the Stars Season 11 for Bristol Palin. Yes, fans were able to trump Romeo's 6 point lead over Ralph last week, but now fans would have to more than double that to keep their favorite in.  How can this be anything other than a call to power vote?  Or, could it be a way of ensuring the show gets at least one couple in the finals that they want, or loses one couple they definitely don't want?
And yes, by all reports, the injured Kym Johnson is expected to participate in tonight’s show. Or at least, we haven’t seen anything to the contrary. See the video below in which poptv.com paparazzi catch the constestants at the Dancing with the Stars rehearsal studio lot. Kym is about 6 minutes in.  Fingers crossed for Kym & Hines. For the regular dances, here’s who’s dancing what:

• Kirstie Alley & Maks Chmerkovskiy: Vienesse Waltz & paso doble
• Hines Ward & Kym Johnson: Argentine Tango & salsa
• Ralph Macchio & Karina Smirnoff: Argentine Tango & salsa
• Chelsea Kane & Mark Ballas: Argentine Tango & rumba

In the winner take all bonus round, the 4 couples face off in groups of 2, then the winner from each set face off. So 2 couples will definitely cha cha twice, with what I'm assuming is different choreography each time.  This means the couples have had to prepare 4 dances (or 3 full ones if you take into account each cha cha is only 45 seconds, the two equal the time of one full dance) Make sense?  Pro Mark Ballas' USAToday blog cited 4 dances instead of 3, and conspiracy theories grew like wild fire. But there is no controversy here. Seems he is counting each cha cha as two dances that all contestants need to prepare for, and not presuming he will win his round as many had thought.
Dancing with the Stars Season 12 Semifinals begins at 8 p.m. (EST) on ABC.