The Mirror reports that the 23-year-old 'Talk That Talk' songstress had a "backstage meltdown," which apparently caused her to nearly cancel a show in Dublin, Ireland on Nov. 25 -- the location is where she's shooting her 'You Da One' video.

"I'm so light-headed! WTF!!!!!!" Rihanna wrote on Twitter. Record executives reportedly put her on the health watch as a result of her strenuous activity, which comes from her 10-month, 101-day tour schedule.

Reports also claim she chopped it up with Beyonce over advice on how to balance her health and demanding career.

Watch 'Rihanna Reportedly on 24-Hour Health Watch'

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