Exclusive "The Real Housewives of New York City" is fulfilling its pledge to become more diverse by welcoming motivational speaker Bershan Shaw into the fold ... TMZ has learned. Sources close to production tell TMZ…

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American actor Lindsey Broad is best know for playing the Dunder Mifflin temp Cathy -- who puts the moves on Jim during the Tallahassee Sabre store openings -- in the 8th season of the hysterical…