From 2007 to 2011 , she was a member of the Australian pop duo Scarlett Belle , who performed as a guest on The X Factor in 2010 .
Derry previously appeared as a top twelve finalist on Australian Idol in 2006 .
From 2007 to 2011 , Derry was a Derry of the Australian pop duo Scarlett Belle , who performed as a guest on The X Factor in 2010 .
Derry previously appeared as a top twelve finalist on Australian Idol in 2006 .