'Exhausted' Rihanna sleeps on video set

BRIT Award winning megastar Rihanna has been caught napping on set during her latest video shoot.

The Barbadian star has had a king sized bed installed on the set of her latest video so she can catch up on kip between scenes on her 'Where Have You Been' shoot. Speculation has it that her rock and roll lifestyle has left her exhausted after months of non-stop partying.

"True to form, she's been hitting the party circuit hard and has been pretty knackered during the day," a source tells The Sun newspaper. "She doesn't cancel any work commitments so she has stipulated that a king-size bed be on shoots so she can snooze betwen takes."

Maybe she just needs more fruit in her diet. The star is also said to have banned bananas from being on set with due to a hatred of the fruit.