Complex sentence: In a change from previous seasons, iTunes bonus multipliers were extended to songs performed in the final performance show; all iTunes votes received for the six weeks leading up to the finale were cumulatively added to online and app finale votes for each finalist.
Split into simpler sentences: In a change from the previous seasons, iTunes bonus multipliers were extended to songs performed in the final performance show. All iTunes votes received for the six weeks leading up to the finale were cumulatively added to online and app finale votes for each finalist.