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Ariana Grande has begged fans to stop sending online death threats to celebrity blogger Perez Hilton after he alleged the singer has a cocaine problem.

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On Sunday, the gossip blogger, whose real name is Mario Lavandeira, Jr., took to Twitter to confront singer about her purported drug use.

In a direct post to Grande, he wrote, "Are you okay? I heard someone saw you doing cocaine at a party! Stay away from drugs Ariana!!! I'm praying for you! You can overcome this! #JustSayNoToDrugs."

And after receiving threats from Grande's devotees on his personal social media sites, he took to Instagram to scold her fans for their negative posts and sick threats aimed at his infant son.

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Hilton wrote, "ENOUGH is enough!... (Fans) should KNOW better than to wish death on a baby and say the disgusting things that 99 per cent of her fans have been spamming my Instagram with. For every day you continue to say vile things on my photos, I will continue to bring it to the attention of Ariana... And, at this point, her silence on this matter is shameful. Her team KNOWS what her fans are saying about my family. Ariana keeping quiet is condoning and promoting that behavior! Shameful, Ariana. Shameful! Quit being such an enabler and SAY SOMETHING!"

And on Thursday, Grande finally spoke out and called on her fans to stop the threats and name-calling online.

She tweeted, "arianators (fans), I know u don't like when ppl (people) say bad things about me but please don't wish negativity upon any1. don't give up ur light, I (love) u."

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While Grande did not comment directly on the drug use rumors, a source close to the singer tells GossipCop.com that Hilton's claims are "all lies" and "not true." The insider claims the singer has already hired a legal team and plans to sue the blogger for slander.