Just days after her “disastrous” photoshoot for OK magazine, Britney Spears reportedly behaved like a “complete and utter spoilt brat” during another photo session last week.

An onlooker told the News of the World that Britney was sullen and uncooperative during Wednesday’s shoot: “She was completely uncooperative and left everyone hanging about when she went for an hour’s massage - twice.”

“She just didn’t want to cooperate and was snotty and rude to everyone - behaving like a complete and utter spoilt brat.”

“When she wasn’t p*ssing people off, Britney was smoking like a chimney. She didn’t eat or drink anything other than can after can of Red Bull. She could have drank 20 of them all told.’

The photo and video shoot is supposed to be promotional material for her much-rumoured comeback single but despite months of rehearsals at dance studio, the onlooker added that Britney was far from comfortable when it came to pole-dancing for the cameras: “She had a problem with the extras being about when she did the pole dance.”

“She was shy or embarrassed or something and she really started struggling with the whole thing.”

“You could see she was getting a bit wobbly but no one expected her to throw a complete fit. Suddenly she was in floods of tears and stormed off set. She eventually came back but was sobbing hysterically.”

“All her make-up had run. By now it was nearly midnight and the director just called things to an end and sent people home. It was a total shambles.”

  • Photos from the session can be seen here.