Best Singer
Best Overall Performance
Best Look-a-Like (so who looks the most like the person who sang the song)
Most fantastic outfit
Most out of tune
Best dancer
Worst dancer
Best strangling of cat sound-a-like
Best facial expressions
Most emotional perfomance
Craziest dance moves
Who was that meant to be certificate
The most fun performance of the evening
The most popular performance
Sorry cant think of anymore of these. I know some might seem a little mean with the worst singer etc, but if its a group who know each other then having bad as well as good singers/certificates is always good fun.
Hope that helps and im sure the night will be great