Complex sentence: Matt Corby began his music career aged 16 on reality TV talent show Australian Idol in 2007, which ultimately saw him place as the season's runner-up to "Natalie Gauci".
Split into simpler sentences: Matt Corby began his career aged 16 on the Australian version of reality TV talent show Australian Idol in 2007. He was 16 when he auditioned and subsequently placed as the runner-up to "Natalie Gauci".