She is arguably best known for her brief tenure as co-host of the Hot30 Countdown on 2Day FM, which was broadcast nationally on the Southern Cross Austereo's Today Network until it was officially axed in January 2013 following the suicide of Jacintha Saldanha.

[3] In December 2012, she and Christian posed as Queen Elizabeth II and Prince Charles to make a prank call to the hospital where Catherine Middleton was convalescing.

Greig writes an online dating column for Yahoo Be and has contributed articles to Mamamia, an Australian women's website.

[9] In December 2012, Greig and Christian broadcast a prank call they had made to King Edward VII Hospital, where Catherine, Duchess of Cambridge was convalescing, posing as the Queen and Prince Charles.

It later transpired that one of the nurses who answered the call, Jacintha Saldanha, committed suicide as a result of the prank and the media attention it generated.