Complex sentence: Justine started out in music as a songwriter and singer in the 1990s, before first coming to wider notice when she featured on the hit Chicane album "Behind The Sun" in 2000.
Split into simpler sentences: Justine started out in music as a songwriter and singer in the 1990s. She first came to wider notice when she featured on the hit Chicane album "Behind The Sun" in 2000.