Rihanna gave fans a huge scare earlier this week when reports hit she'd been rushed to a hospital in Sweden right before a sold-out concert. For hours, it was unclear what had sent RiRi to the ER, until the singer's camp finally released this statement from the ill star: "I am sorry to everyone who was coming to my show in Malmo," Ri told fans. "I was so excited to perform for you all. It would have been a great time ... so much better than being sick with the flu, ugh! I'm really disappointed I couldn't be there."

But the story doesn't end there. New sources close to the 'We Found Love' diva are claiming it was Rihanna's hard-partying ways that landed her in a hospital bed. "Rihanna is running on empty but she's still been going out drinking and living it up," an insider tells UK paper The Sun. "She doesn't have any down time where she can completely relax. She spends most of her time in the studio, on stage or in clubs."

The source went on to reveal that Rihanna's team of physicians is warning the star to curb her "party girl lifestyle" before it takes a more serious toll on her health. "Doctors are worried she's overdoing it," shares the source. "She needs to take some time off. Otherwise she'll be vulnerable to more illness."

Staying healthy should be priority number one for Ri right now. Her Loud tour is slated to continue its trek across Europe through the end of the year, and Ri's new CD, 'Talk That Talk,' comes out Nov.21. In other words, Rihanna has a lot going on she'll need energy for!

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