Complex sentence: At the end of the show, they announced a list of five contestants, instead of bottom three as usual, and then it was declared that five of them were all the Top 5 popular votes of the week.
Split into simpler sentences: At the end of the show, they announced a list of five contestants, instead of bottom three as usual. After that, it was declared that five of them were all the Top 5 popular votes of the week.