Ariana Grande's Brother My Sister's Not a Cannibal!!!
Frankie Grande is jumping to Ariana Grande's defense over some viral cannibalism claims on TikTok -- all cooked up to scare fans away from buying her concert tickets.
Ariana's big bro took to X Thursday to fire at fans spreading rumors that cops found human remains in his sister's starter house years ago ... cackling over the crazy claims.
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If you haven't seen the original TikTok, check it out ... it's a social media user making the claims without providing any sort of evidence to back up the point -- but, some people took it as fact and started pushing the rumor anyway.