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BNPS_KurtCobainsNirvanaSplitThreatLetter_04.jpg (01202 558833)<br />
Pic: JuliensAuctions/BNPS<br />
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A furious Kurt Cobain threatened to break up Nirvana at the height of their fame after an article claimed he and his pregnant wife had gone on a heroin binge.<br />
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The guitarist was so outraged by Vanity Fair's references to Courtney Love he angrily scrawled a message to the head of his label in which he declared "f**k Nirvana". <br />
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This previously unseen letter which shows the singer tried to protect his family from the limelight has emerged for the first time at auction with a £21,000 price tag.