Article continues below advertisementSiblings share a bond like no other, and Oliver Hudson is fully embracing his big brother role while poking some fun at sister Kate Hudson's daring fashion choice.Article continues below advertisementSource: MEGAKate Hudson wore a daring green Valentino gown at a New York City premiere.Article continues below advertisementAt the New York City premiere of Song Sung Blue, Kate, 46, stole the spotlight in a jaw-dropping green Valentino gown paired with a pale pink cape.