Identification of the opinion leaders in the world's largest microblogging site,Twitter, is crucial problem of social network analysis.Twitter has quick information flow and has high impact on forming opinion on mass public.This paper presents the study based on various centrality mesaure approaches for finding key players for a specific political trend on twitter. A novel weighted approach has been proposed for finding opinion leaders based on the centrality measures. Experiment has been conducted on the twitter's data for the sit in procession of Pakistani politician Imran Khan in 2014. It has been found that Twitter opinion leadership makes a significant contribution to individuals' involvement in political reforms.