Rihanna has been criticised by fans for yawning on stage at her recent show in London.
The singer, who is rounding-up for record-breaking shows at London's 02, was reportedly seen yawning while holding up a mic to the crowd and arrived on stage 30 minutes late.
The 'We Found Love' singer who performed at this month's Capital FM Jingle Bell Ball, is has been suffering from a lack of sleep and long work days.
Reports emerged that Rihanna's recent performances have not been up to scratch.
A source told Metro: "She was complaining she hasn't had any kip in days and was a bit crabby."
Rihanna has been on her gruelling ten-month, 101-date tour since the start of the year and is currently promoting new album 'Talk That Talk'
The singer told fans over Twitter following the show: ''I'm so light-headed!"
Rihanna - live
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