Pink has been suffering from an "upper respiratory infection", but was forced to "clear up" a misunderstanding when paparazzi and fans accused her of cancelling the show in order to spend a day at the beach.
"I've already been sick twice on this Australian tour," the 38-year-old singer wrote on Instagram, the Daily Mail reports.
"What these parasite paparazzi don't show you is two doctor visits in Byron on two consecutive days, antibiotics, steroids, Vick's, nose spray, throat spray, NyQuil, and a screaming baby in the middle of the night."
Pink continued: "You can think whatever you want, it's your right, but I have never taken advantage of anyone in my entire life. I have never phoned in a single tour, I have an impeccable record for not cancelling."