Complex sentence: The judges were unable to decide between GMD3 and Triple J when it came down to the final spot, so both groups had to compete in an a cappella sing-off, where GMD3 performed "Bless the Broken Road".
Split into simpler sentences: The judges were unable to decide between GMD3 and Triple J when it came down to the final spot. Both bands had to compete in an a cappella sing-off, where GMD3 performed "Bless the Broken Road".