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The joke is on the infamously funny Khloe Kardashian this time around!

PHOTOS: Khloe Kardashian Is A Jetsetting Animal!

The new host of The X-Factor may be rubbing people the wrong way, or an unfunny fan may just be trying to get some attention. Yesterday, it was reported that an envelope addressed to Khloe at CBS Studios contained a letter laced with some white powder.

Extremely alarmed, the FBI came to check out the substance and it turned out to be completely harmless. 

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This is the third letter that has been addressed to this studio – two of the same kind of letters were also sent to Bristol Palin, a former contestant on Dancing with the Stars.

Hopefully the FBI is able to figure out the source of these mysterious letters … and soon! 

SOURCE: TMZ || Photo Credit: WENN

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