"When we found out we naturally took a bit of a selfie to show my friends,"Chantelle told Merrick Watts onTriple M.
Just 15 minutes later she took her winning ticket to the TAB only to be told it had already been claimed.
"Someone had a pretty good game at filtering my picture and cutting out my barcode and putting it into an automated machine,"Chantelle said.
The theft was made all the worse after Chantelle realised the culprit must be one of her Facebook friends.