Rihanna had meltdown before canceling Grammys performance

The Bajan beauty, 27, was 'screaming and hysterical' before she decided to pull out of performing at the annual awards show at the last minute. "Rihanna was loudly expressing displeasure over her rehearsal. She was allegedly loud and upset and later bailed on the event," a source said.
While Rihanna's people say the reason she could not perform and left the show because she had a medical issue, bronchitis, sources close to the 'Diamond' singer said that she was too upset to stay and watch the show.The R&B star sang flawlessly at a Lionel Richie charity event just two days before the Grammys.
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