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The parents of the singer's husband Blake Fielder-Civil believe that the only way to help the singer is by forcing the record company into realising how serious the situation is.
They told BBC 5 Live: "Perhaps it's time stop buying records, because by doing that affects the record company and the record company may take notice. But I believe that the record company have a responsibility.
"They could either say: until you sort yourself out we're not doing any more work together, or they take responsibility and make the pair enter a proper rehabilitation unit, where they can't leave until they're sorted out."
The pair admitted that they were scared that their son may end up dead if nothing is done to help to the 'Rehab' performer.
They added: "And we're concerned that if one of them dies, the other will die. They're a very close couple and if one dies through a substance abuse, the other may commit suicide."
