The Barbados-born singer has been embroiled in controversy lately. Her Diamonds World Tour hasn't slowed down her love of partying and she's been seen on a number of wild nights out, including with model Cara Delevingne. She's also been late on stage and even hit a fan with her microphone during a show in the UK.
The star's mentor is Jay-Z, who runs the Roc Nation label she is signed to. He is apparently growing tired of her antics.
"Everyone can see Rihanna's not behaving herself. Fans have paid hundreds of pounds for tickets and she's regularly showing up hours late," an insider told British magazine Look. "Then she often gives lacklustre performances where she even forgets her words at times. They issued a written warning which was emailed to Rihanna."
A number of fans have lashed out at Rihanna on Twitter. She has been slammed for arriving over two hours late to shows and for giving lacklustre vocals on stage.
Hip-hop mogul Jay-Z is apparently worried his protégé could be ruining her career.
"There's no excuse because, because Jay knows exactly how talented Rihanna can be on stage," the insider explained. "He takes work very seriously and this is not what he expects from his talent. She'd better start giving her fans what they paid for."
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