Maksim & Karina

Exes Forced to

Bump & Grind

9/21/2009 7:55 AM PDT BY TMZ STAFF
Definition of AWKWARD: heartbroken Maksim Chmerkovskiy forced to perform in an extremely sexually charged dance routine with his ex-fiancee ... just days after Karina Smirnoff broke his heart.

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We're guessing they agreed to perform their steamy Emmy number before they called off their engagement -- 'cause the amount of touching, thrusting and inner-thigh grabbing Maksim had to pull off with his ex ... could only have made him even sadder....