Barnaby Joyce has confirmed he will join Pauline Hanson's One Nation party, following weeks of speculation; The NSW government will fight against a High Court challenge arguing Australia's social media ban is a breach of the Constitution; A firefighter has died after being struck by a tree while battling a bushfire threatening homes in NSW, as authorities warn the risk of dangerous fires is likely to linger for months; Katy Perry and Justin Trudeau have gone Instagram official with their romance. Support independent women's media CREDITS   Host/Producer: Ailish Delaney Audio Production: Lu HillBecome a Mamamia subscriber: https://www.mamamia.com.au/subscribeSee omnystudio.com/listener for privacy information.