Lady in red Rihanna hosts Las Vegas party covering up in conservative maxi dress...if you ignore the see-through stripes

By SARAH FITZMAURICE Countdown: Rihanna took to the mic to call in the New Year and raised her glass She was never going to opt for a plain black dress was she?But ushering in the New Year Rihanna stepped out in a striped maxi dress which verged on conservative, discounting the see-through stripes. The 22-year-old singer was the hostess with the mostest showing off her fierce figure at Pure Nig...