Lawyers acting on behalf of the sponsors of California's same-sex marriage ban say that a judge acted 'prematurely' in allowing the weddings to take place.
Senior Counsel Austin Nimocks, for the Arizona based Alliance Defending Freedom group, said it was "unfair" that the unions were being allowed to take place, while Supreme Court justices were still considering the case.
The group has the right to ask a judge to reconsider their decision, that Proposition 8's backers did not have the legal authority to defend the ban, over the next 22 days.
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The study found children born in the 1980s have found it much harder to build up wealth in housing and pensions as they age.
The singer ended speculation over who would perform by saying "the rumors are true" to her 63 million Twitter followers on Friday morning.