It was then that Pink decided to respond. Although not tweeting herself, the songstress 'liked' a Tweet by an Adelaide newsreader, Melanie Usher, who defended the singer against angry fans.
'Geez - don't fall sick on a concert tour in Oz,' she wrote.
'A performer is not a robot and they fall sick too. Give her a break and stop complaining about two concerts which ARE going to be rescheduled.'
A statement released by Live Nation on Tuesday read: 'On medical advice P!NK’s performance scheduled for tonight (Tuesday, August 7) at Sydney’s Qudos Bank Arena has been postponed.
'Pink was admitted to St. Vincents Hospital in Sydney on Sunday night, suffering from dehydration. She was treated and discharged.
'She was readmitted to hospital on Monday and diagnosed with a gastric virus.
'On medical advice Pink remained in hospital overnight, continuing her treatment and recovery. She will be reassessed by her doctors today.
'A further announcement will be made when an update becomes available.'
QUDOS BANK ARENA, SYDNEY
FRIDAY AUGUST 3 - POSTPONED
MONDAY AUGUST 6 - POSTPONED
TUESDAY AUGUST 7 - POSTPONED
THURSDAY AUGUST 9 // SATURDAY AUGUST 11 // SUNDAY AUGUST 12
SATURDAY AUGUST 25 // SUNDAY AUGUST 26
BRISBANE ENTERTAINMENT CENTRE
TUESDAY AUGUST 14 // WEDNESDAY AUGUST 15 // FRIDAY AUGUST 17
SATURDAY AUGUST 18 // MONDAY AUGUST 20 // TUESDAY AUGUST 21
THURSDAY AUGUST 23
ROD LAVER ARENA, MELBOURNE
TUESDAY AUGUST 28 // WEDNESDAY AUGUST 29