Derek Hough and Shannon Elizabeth by Kelsey McNeal/ABC
It would seem that Kristi and Mark cannot be KO'd. Having topped TVGuide.com's Dancing with the Stars Power Rankings since the season began, the favorites now are enjoying their largest chunk of the reader vote to date - 70.9 percent. Playing a part in the pair's increased lead was the fall of Shannon and Derek, who this week - and in the wake of their off-stage romance being exposed - lost nearly half of their supporters. The result is we now have a veritable three-way fight for distant, distant second. Elsewhere, Marissa and Tony crept out of the cellar, leaving Mario and Karino to claim last-place dishonors.

The Top 6 Power Rankings
70.9% Kristi Yamaguchi and Mark Ballas
8.9% Shannon Elizabeth and Derek Hough
8.0% Cristian De La Fuente and Cheryl Burke
8.0% Jason Taylor and Edyta Sliwinska
2.2% Marissa Jaret Winokur and Tony Dovolani
2.0% Mario and Karina Smirnoff