Career pressure is putting Britney Spears in danger of another breakdown her friends have said this week.  Britney Spears is in danger of another breakdown due to the pressures of her comeback world tour friends fear. "Britney has been told that if she doesn't deliver on this tour a lot of the public support she has earned is going to fade away,” an insider told Showbiz Spy. "Britney is feeling the pressure more and more as she rehearses for the tour. She knows one slip-up and it could all be over for her because she will be crucified in the press. After what she's been through, it's hard to imagine how she's going to cope."

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