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Her zany sartorial choice is reminiscent of the character that has won her acclaim.
New Girl follows the life of an eccentric young woman living with three male flatmates in Los Angeles.
It was a night of success for new shows.
Homeland – the US thriller which explores the war on terror – snared the night's top prizes.
Leading lady Claire Danes was recognised for her turn as a bi-polar CIA agent hunting a terrorist.
And the show saw off competition from Mad Men to be crowned Best Drama.
Flame-haired beauty Julianne Moore was also triumphant, taking home a prize for her portrayal of US politician Sarah Palin in the film Game Change.
The small screen production centres around the American presidential campaign in 2008.
Accepting her award, Julianne said: "You can't give any kind of performance without a great story, so I'd like to thank the Republican party for fostering a truly amazing political story."