The writer must be using "petite" as a euphemism for short.
Perhaps the writer used the word 'petite' to portray Natalie as little David against the Goliath - Free Republic.
Natalie needs to quit whining and get over it. No one wants to listen to her music or her opinions. She singlehandedly ruined her own career.
...and fat. Squat would have been the adjective of choice..or maybe the verb of choice.