poll_qs = Poll.objects.filter(
        event=event
    ).prefetch_related(
        'polloption_set',
        Prefetch(
            'pollanswer_set',
            queryset=PollAnswer.objects.filter(singer=singer_choir_profile).select_related('option').first(),
            to_attr='answer'
        )
    )

    for poll in poll_qs:
        if poll.answer:
            poll_answer_form = PollAnswerForm(
                poll,
                singer_choir_profile,
                poll.polloption_set.all(),
                data or None,
                initial={'option_%s' % poll.id: poll.answer[0].option.id}
            )
        else:
            poll_answer_form = PollAnswerForm(
                poll,
                singer_choir_profile,
                poll.polloption_set.all(),
                data or None
            )
        poll_forms.append(poll_answer_form)