Rihanna 'treated for exhaustion'
Rihanna has reportedly been treated in hospital for "exhaustion and dehydration".
The 24-year-old singer - who has been attending high profile showbiz events and travelling all over the world to promote her new film Battleship - was out partying at the Met Gala in New York on Monday night.
According to gossip website MediaTakeOut.com, Rihanna was taken straight from the glamorous function - where she wowed in a sleek black gown by Tom Ford - to ER where she posted a picture of her arm with an IV drip attached on Twitter.
Sources claimed she was suffering from "exhaustion" and "dehydration", but after a brief stay in hospital doctors allowed her to fly home to Los Angeles, and she posted another picture of herself on the runway in front of the aeroplane.
Earlier in the weekend, Rihanna cancelled her rehearsal for Saturday Night Live, apparently telling producers that she was suffering from exhaustion and the flu.
She has since tweeted: "Quote of the day - never failure, always a lesson."