REPORT: Jillian Michaels Passes 'The Biggest Loser' Torch to Anna Kournikova

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Jillian Michaels will appear on her final episode of NBC's "The Biggest Loser" tonight and today next season's new trainer was finally revealed. reports that tennis star Anna Kournikova will take over next season in Michaels' absence.

The reality show's executive producer Todd Lubin explained the move, saying that "The Biggest Loser" is "getting slightly away from just the tape measure, and getting into overall well being and health ... We intentionally tried to not replace Jillian."

Kournikova guest starred on the show in its tenth season, conducting a tennis-themed training session.

"The Biggest Loser" airs Tuesdays on NBC.