"Ladies and gentlemen, we have a doppelgänger in our midst. Dora, how dare you steal my look," Kills wrote in the caption about the popular children's character.
It didn't go down well with fans.
"Stop trolling," asked one fan.
"I swear theres something wrong with her," wrote another.
"Excuse me but Dora was way famous even before u. Just try to accept it and move along," wrote a third. "You really are pathetic."
Another commentator asked if Kills could be kicked off Instagram for the post.
Some fans saw a funny side to the comments.
"Ha! I love that you can laugh at yourself," wrote one.
Moon has since made his own joke about their controversial comments, posting this image on Twitter:
Kills and Moon were replaced by Shelton Woolright and Natalie Bassingthwaighte for the rest of the season.
Read more: X Factor review: Are the new judges any good?
- nzherald.co.nz