Added parent class to chorus objects.
Added parent class to chorus objects.

lukepolo/chorus,jamesblunt/chorus,lukepolo/chorus,lukepolo/chorus,jamesblunt/chorus,jamesblunt/chorus,prakash-alpine/chorus,prakash-alpine/chorus,prakash-alpine/chorus,prakash-alpine/chorus,lukepolo/chorus,lukepolo/chorus,prakash-alpine/chorus,jamesblunt/chorus,lukepolo/chorus,lukepolo/chorus,jamesblunt/chorus,jamesblunt/chorus,jamesblunt/chorus