Jillian Michaels Embarrassed Herself At A Malibu Triathlon, Says 'Biggest Loser' Co-Star

JIllian Michaels Should Be Embarrassed, Says Co-Star
Jillian Michaels walks the runway at the Red Dress Collection 2013 Fashion Show, on Wednesday, Feb. 6, 2013 in New York. (Photo by John Minchillo/Invision/AP)
Jillian Michaels walks the runway at the Red Dress Collection 2013 Fashion Show, on Wednesday, Feb. 6, 2013 in New York. (Photo by John Minchillo/Invision/AP)

Jillian Michaels didn't just SUCK ASS at the Malibu Triathlon -- she was an EMBARRASSMENT -- so says her former "Biggest Loser" co-star Cara Castronuova.

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