McFadden and Irish model Vogue Williams refused to answer questions about their relationship, but the singer quipped: “She doesn’t speak English! I speak English.”
The pair, reportedly a couple since meeting in Ireland in April, had spent six days together in Sydney, where McFadden now lives, after Williams flew in from Dublin.
She has just finished appearing in a play in Ireland called Blow Up The Liffey Bridges.
After completing her run in the play, she took to Twitter to express how she was looking forward to her trip Down Under.
She tweeted: “Finished the play, can't wait for some time off now! 180 excess baggage,great start to my holiday!!!'