I Need Help Choosing....

Okay my school I having a early talent tampil and for the 3 tahun being there for our last tahun thee we are posing to do te best performance we have done each talent tampil since 7th grade me, my friends, my boyfriend, and his friends have done one of Michaels songs and this tahun there is a prize of $200 for the winners. My mind has been completely wiped from ideas to do and we've done these following songs already.Smooth criminal, Bad, The way anda make me feel, Jam, beat it, Black atau white and We are the world. A lot I know but this tahun we have too win so I need help oleh choosing either from, History and thats it I need opinions on what should I do and how should we do it. And finally where can I get replica costumes under $100 On the Internet