Fraser became a member of the Australian Christian music group Hillsong Worship from 2005 to 2010; she rejoined the group in 2016 since she was the songwriter and lead vocalist for the Grammy winning song "What a Beautiful Name", which was credited under her married name Brooke Ligertwood. Other well-known songs written and performed by Fraser (both with Hillsong Worship and as a solo artist) include "Hosanna", "Better", "Who You Say I Am", "King of Kings", "Awake My Soul".