THE night before she wore heels and a short skirt, but as everyone knows, Rihanna’s style is forever changing.The 24-year-old star headed out for dinner in Santa Monica Tuesday night looking rather boyish as she went to meets friends in her favorite restaurant Giorgio Baldi.Rihanna’s laid-back look was a far cry from the feminine attire that she is often pictured wearing.The singer teamed a pair of loose denim-esque flared trousers with a baggy blue and white striped top as she arrived at the eatery.On her feet she wore a pair of tan-coloured peep-toe sandals that exposed her white-painted toe nails.  Her dark hair was pulled up into a messy bun, and her fringe was pushed to the side by the tan visor hat that she was wearing.However, despite being in the U.S. sunshine it seems Rihanna is desperate to be back in the dreary British weather.‘I’m missin the UK a bit, but I’ll be back wit y’all very soon,’ she tweeted to her 18,864,626 followers yesterday.Rihanna obviously isn’t planning on slowing down her hectic schedule despite landing herself on a drip thanks to exhaustion.The Umbrella star was rushed to hospital after partying at the Met Gala in New York last week.Being the social network queen she is, the You Da One hit maker tweeted a picture of herself attached to an IV drip in a hospital.She was suffering from ‘exhaustion and dehydration’, according to MediaTakeOut.dailymail.co.uk