IT is dubbed the playground for adults and every visitor seems to get into some sort of mischief while partying in Las Vegas.And on Saturday night Nicole Scherzinger certainly looked ready to sin as she stepped out in a dazzling gold dress to celebrate her birthday.The 33-year-old X Factor judge, who turns 34 at the end of the month, showed off her enviable shape in the glittering backless mini-dress which also boasted a plunging neckline.The metallic dress complimented her skin tone to perfection, while the only splash of colour came from her bright pink manicure. Daily Mail