The 34-year-old paired it with a white T-shirt and simple white sneakers.
Hawkins too apologised for his limited role in the conversation and thanked Rachel's mum for taking their calls to apologise in person.
Phillips added that the incident had impacted deeply on the entire production crew.
The media personality kept things casual in a pair of black denim jeans and a matching jacket as she stepped out for The Block auction in on Saturday.
The public appearance comes just days after Lauren apologised on-air to the mother of a murdered child she had accidentally laughed at during a broadcast.
The chat saw Phillips describe how she had used the podcast discussing Rachel's tragic murder to cheer herself up.