"These articles were a deliberate malicious take-down of me", the actress testified.
Collins said the articles were published to coincide with a high point in Wilson's acting career, including the release of "Pitch Perfect 2".
However, Bauer is standing by the articles saying they are true and, in any case, the allegations were "trivial" and unlikely to cause Wilson any harm to her career or financially.
The jury was shown photos of Wilson's childhood homes, the dog caravan for her parent's "Petcetera Etcetera" business, school class photos and a shot of her Cabbage Patch doll "Nathan".
The Californian resident told the court she had never lied about her age as claimed by the articles.
"There's many aspects to being a bogan", she said.
According to courtroom reports, Wilson is saying that she was sacked from at least two movies and has been unable to find work since Bauer's campaign of eight articles was published back in 2015.
"The phone just stopped ringing", he said.
In the two years since the articles were published, she has had only two roles - one a cameo in the Absolutely Fabulous movie, which she did as a favour, and a stage role in London.
She says Bauer Media damaged her reputation by printing articles alleging she had used a fake name, claimed she was 29 when in fact she was 36, and had lied about her background - all in the name of boosting circulation, he alleged.
The Bridesmaids actor arrived in Melbourne last week before the expected three-week trial.
"Rebel Wilson didn't matter", he said.
In the witness box, Wilson tearfully recounted the "nasty" articles that she claims damaged her career after a journalist employed by the publisher had been contacted by one of Wilson's former schoolmates. To which Justice John Dixon quipped from the bench "that's called a CUB".
Wilson returned to Australia and chose to become an actress after finishing an arts-law degree at the University of New South Wales.
It had been standing room only when Rebel Wilson walked in.
Ms Wilson flashed her trademark smile and nearly looked the part in this new court drama.
'People really warmed to my character Fat Amy, ' she said.
"My mum's obsessed with dogs", Wilson said.
"To stand up there like that, " she said.