Christine Muscat
Christine Muscat (born 27 February 1981)[1] is a singer-songwriter and vocal coach who played Jack Wilson's sister Kathy in 1995-1996. She is better known as half of the singing duo Sister2Sister, alongside her younger sister Sharon. She worked as a presenter on MTV Australia for a year. As well as working as a vocal coach, she has worked as a backing singer for artists such as Delta Goodrem, Jess Mauboy, Boy George and Michael Bolton [2]