It's likely that the last straw for Jackson, 19, was the heavy backlash she experienced today after posting a photo on Instagram of herself and a dingo, alongside a reference to the death of baby Azaria Chamberlain.
She uploaded the photos to her Instagram page with the caption "a dingo ate my baby".
The post has attracted plenty of criticism, with many calling her out as being insensitive to the tragedy.
Following the outcry, Jackson posted an apology on Twitter.
It's been a turbulent week for the young star, who's sponsored appearance at the Melbourne Cup received mixed reviews earlier this week.
The VIP guest - who was reportedly paid $100,000 by Myer - made headlines on Tuesday for her unusual conduct in the Birdcage, where she pressed her face up against the venue's windows and poked her tongue out at photographers in a bizarre display.
The following day, Jackson tweeted a photo of The Herald Sun's headline regarding her antics - "WACKO JACKO 2.0" - to her 1.35 million Twitter followers.