Last week, Teresa Giudice made her first red carpet appearance since her release from the Danbury federal prison last month.

"The Real Housewives of New Jersey" star was all smiles as she posed for pictures at the grand opening of Melissa Gorga's boutique in Montclair, New Jersey. While she told E! News exclusively that she was "feeling great," eyewitnesses at the event told Radar Online that Teresa seemed like a changed woman at her first public appearance.

"She had to be told where to stand and what to do and basically did nothing," said the insider about the reality star. "She wasn't at all like her old diva self!"

Teresa became famous for her feisty attitude and for throwing a table on the Bravo show, but the source said that she seemed to be a different person at the event.

"She was so zen after being in prison that nothing is fazing her anymore," said the insider. "She figures nothing else that bad can happen to her." The source adds that because the star spent a year away from her daughters, she is now "at peace with everything."

While the insider revealed that everyone was very impressed with the mother-of-four's behavior, Bravo producers are allegedly worried that the star's new mellow attitude might signal that her days of fighting and screaming fits are over on the show.

"The producers are worried that the show won't have any bite with her new calm attitude," said the source, adding that Teresa's fights are what makes people tune in to the show.

It was previously reported that Teresa will be a part of the upcoming season of "RHONJ" as she has reportedly signed her contract for season 7. Teresa is said to be one of the highest earning Housewives on Bravo. For season 7, the cookbook author will reportedly earn $1 million, which makes her the network's second highest paid star, second only to New York Housewife Bethenny Frankel, who will reportedly earn $1.5 million for the upcoming season of the franchise.