I love how this mash up has the cut-out lyrics of the original, and the extended ending from Sing2, essentially allowing g them to duet together while both getting solo parts. It was a very creative way of structuring the Mash-Up, so kudos to you for that!
I would much rather have Porsha than Mike. Mike's just cocky and arrogant, selfish and greedy. After letting those bears in the Moon theater who accused Mike of cheating at a card game at a nightclub, Buster should've fired Mike. Porsha started off spoiled, but after seeing her dad's decision making was unacceptable, Porsha stood up to him and sang the song beautifully and got herself a new family and a new life.